atw.c revision 1.24
1 /* $NetBSD: atw.c,v 1.24 2004/02/17 21:20:55 dyoung Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000, 2002, 2003, 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by David Young, by Jason R. Thorpe, and by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Device driver for the ADMtek ADM8211 802.11 MAC/BBP. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: atw.c,v 1.24 2004/02/17 21:20:55 dyoung Exp $"); 45 46 #include "bpfilter.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/callout.h> 51 #include <sys/mbuf.h> 52 #include <sys/malloc.h> 53 #include <sys/kernel.h> 54 #include <sys/socket.h> 55 #include <sys/ioctl.h> 56 #include <sys/errno.h> 57 #include <sys/device.h> 58 #include <sys/time.h> 59 60 #include <machine/endian.h> 61 62 #include <uvm/uvm_extern.h> 63 64 #include <net/if.h> 65 #include <net/if_dl.h> 66 #include <net/if_media.h> 67 #include <net/if_ether.h> 68 69 #include <net80211/ieee80211_var.h> 70 #include <net80211/ieee80211_compat.h> 71 #include <net80211/ieee80211_radiotap.h> 72 73 #if NBPFILTER > 0 74 #include <net/bpf.h> 75 #endif 76 77 #include <machine/bus.h> 78 #include <machine/intr.h> 79 80 #include <dev/ic/atwreg.h> 81 #include <dev/ic/rf3000reg.h> 82 #include <dev/ic/si4136reg.h> 83 #include <dev/ic/atwvar.h> 84 #include <dev/ic/smc93cx6var.h> 85 86 /* XXX TBD open questions 87 * 88 * 89 * When should I set DSSS PAD in reg 0x15 of RF3000? In 1-2Mbps 90 * modes only, or all modes (5.5-11 Mbps CCK modes, too?) Does the MAC 91 * handle this for me? 92 * 93 */ 94 /* device attachment 95 * 96 * print TOFS[012] 97 * 98 * device initialization 99 * 100 * clear ATW_FRCTL_MAXPSP to disable max power saving 101 * set ATW_TXBR_ALCUPDATE to enable ALC 102 * set TOFS[012]? (hope not) 103 * disable rx/tx 104 * set ATW_PAR_SWR (software reset) 105 * wait for ATW_PAR_SWR clear 106 * disable interrupts 107 * ack status register 108 * enable interrupts 109 * 110 * rx/tx initialization 111 * 112 * disable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 113 * allocate and init descriptor rings 114 * write ATW_PAR_DSL (descriptor skip length) 115 * write descriptor base addrs: ATW_TDBD, ATW_TDBP, write ATW_RDB 116 * write ATW_NAR_SQ for one/both transmit descriptor rings 117 * write ATW_NAR_SQ for one/both transmit descriptor rings 118 * enable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 119 * 120 * rx/tx end 121 * 122 * stop DMA 123 * disable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 124 * flush tx w/ ATW_NAR_HF 125 * 126 * scan 127 * 128 * initialize rx/tx 129 * 130 * IBSS join/create 131 * 132 * set ATW_NAR_EA (is set by ASIC?) 133 * 134 * BSS join: (re)association response 135 * 136 * set ATW_FRCTL_AID 137 * 138 * optimizations ??? 139 * 140 */ 141 142 #define VOODOO_DUR_11_ROUNDING 0x01 /* necessary */ 143 #define VOODOO_DUR_2_4_SPECIALCASE 0x02 /* NOT necessary */ 144 int atw_voodoo = VOODOO_DUR_11_ROUNDING; 145 146 int atw_rfio_enable_delay = 20 * 1000; 147 int atw_rfio_disable_delay = 2 * 1000; 148 int atw_writewep_delay = 5; 149 int atw_beacon_len_adjust = 4; 150 int atw_dwelltime = 200; 151 152 #ifdef ATW_DEBUG 153 int atw_xhdrctl = 0; 154 int atw_xrtylmt = ~0; 155 int atw_xservice = IEEE80211_PLCP_SERVICE; 156 int atw_xpaylen = 0; 157 158 int atw_debug = 0; 159 160 #define ATW_DPRINTF(x) if (atw_debug > 0) printf x 161 #define ATW_DPRINTF2(x) if (atw_debug > 1) printf x 162 #define ATW_DPRINTF3(x) if (atw_debug > 2) printf x 163 #define DPRINTF(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) printf x 164 #define DPRINTF2(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) ATW_DPRINTF2(x) 165 #define DPRINTF3(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) ATW_DPRINTF3(x) 166 static void atw_print_regs(struct atw_softc *, const char *); 167 static void atw_rf3000_print(struct atw_softc *); 168 static void atw_si4126_print(struct atw_softc *); 169 static void atw_dump_pkt(struct ifnet *, struct mbuf *); 170 #else 171 #define ATW_DPRINTF(x) 172 #define ATW_DPRINTF2(x) 173 #define ATW_DPRINTF3(x) 174 #define DPRINTF(sc, x) /* nothing */ 175 #define DPRINTF2(sc, x) /* nothing */ 176 #define DPRINTF3(sc, x) /* nothing */ 177 #endif 178 179 #ifdef ATW_STATS 180 void atw_print_stats(struct atw_softc *); 181 #endif 182 183 void atw_start(struct ifnet *); 184 void atw_watchdog(struct ifnet *); 185 int atw_ioctl(struct ifnet *, u_long, caddr_t); 186 int atw_init(struct ifnet *); 187 void atw_stop(struct ifnet *, int); 188 189 void atw_reset(struct atw_softc *); 190 int atw_read_srom(struct atw_softc *); 191 192 void atw_shutdown(void *); 193 194 void atw_rxdrain(struct atw_softc *); 195 int atw_add_rxbuf(struct atw_softc *, int); 196 void atw_idle(struct atw_softc *, u_int32_t); 197 198 int atw_enable(struct atw_softc *); 199 void atw_disable(struct atw_softc *); 200 void atw_power(int, void *); 201 202 void atw_rxintr(struct atw_softc *); 203 void atw_txintr(struct atw_softc *); 204 void atw_linkintr(struct atw_softc *, u_int32_t); 205 206 static int atw_newstate(struct ieee80211com *, enum ieee80211_state, int); 207 static void atw_tsf(struct atw_softc *); 208 static void atw_start_beacon(struct atw_softc *, int); 209 static void atw_write_wep(struct atw_softc *); 210 static void atw_write_bssid(struct atw_softc *); 211 static void atw_write_bcn_thresh(struct atw_softc *); 212 static void atw_write_ssid(struct atw_softc *); 213 static void atw_write_sup_rates(struct atw_softc *); 214 static void atw_clear_sram(struct atw_softc *); 215 static void atw_write_sram(struct atw_softc *, u_int, u_int8_t *, u_int); 216 static int atw_media_change(struct ifnet *); 217 static void atw_media_status(struct ifnet *, struct ifmediareq *); 218 static void atw_filter_setup(struct atw_softc *); 219 static void atw_frame_setdurs(struct atw_softc *, struct atw_frame *, int, int); 220 static __inline u_int64_t atw_predict_beacon(u_int64_t, u_int32_t); 221 static void atw_recv_beacon(struct ieee80211com *, struct mbuf *, 222 struct ieee80211_node *, int, int, u_int32_t); 223 static void atw_recv_mgmt(struct ieee80211com *, struct mbuf *, 224 struct ieee80211_node *, int, int, u_int32_t); 225 static void atw_node_free(struct ieee80211com *, struct ieee80211_node *); 226 static struct ieee80211_node *atw_node_alloc(struct ieee80211com *); 227 228 static int atw_tune(struct atw_softc *); 229 230 static void atw_rfio_enable(struct atw_softc *, int); 231 232 /* RFMD RF3000 Baseband Processor */ 233 static int atw_rf3000_init(struct atw_softc *); 234 static int atw_rf3000_tune(struct atw_softc *, u_int8_t); 235 static int atw_rf3000_write(struct atw_softc *, u_int, u_int); 236 #ifdef ATW_DEBUG 237 static int atw_rf3000_read(struct atw_softc *sc, u_int, u_int *); 238 #endif /* ATW_DEBUG */ 239 240 /* Silicon Laboratories Si4126 RF/IF Synthesizer */ 241 static int atw_si4126_tune(struct atw_softc *, u_int8_t); 242 static int atw_si4126_write(struct atw_softc *, u_int, u_int); 243 #ifdef ATW_DEBUG 244 static int atw_si4126_read(struct atw_softc *, u_int, u_int *); 245 #endif /* ATW_DEBUG */ 246 247 const struct atw_txthresh_tab atw_txthresh_tab_lo[] = ATW_TXTHRESH_TAB_LO_RATE; 248 const struct atw_txthresh_tab atw_txthresh_tab_hi[] = ATW_TXTHRESH_TAB_HI_RATE; 249 250 const char *atw_tx_state[] = { 251 "STOPPED", 252 "RUNNING - FETCH", 253 "RUNNING - WAIT", 254 "RUNNING - READING", 255 "-- RESERVED1 --", 256 "-- RESERVED2 --", 257 "SUSPENDED", 258 "RUNNING - CLOSE" 259 }; 260 261 const char *atw_rx_state[] = { 262 "STOPPED", 263 "RUNNING - FETCH", 264 "RUNNING - CHECK", 265 "RUNNING - WAIT", 266 "SUSPENDED", 267 "RUNNING - CLOSE", 268 "RUNNING - FLUSH", 269 "RUNNING - QUEUE" 270 }; 271 272 int 273 atw_activate(struct device *self, enum devact act) 274 { 275 struct atw_softc *sc = (struct atw_softc *)self; 276 int rv = 0, s; 277 278 s = splnet(); 279 switch (act) { 280 case DVACT_ACTIVATE: 281 rv = EOPNOTSUPP; 282 break; 283 284 case DVACT_DEACTIVATE: 285 if_deactivate(&sc->sc_ic.ic_if); 286 break; 287 } 288 splx(s); 289 return rv; 290 } 291 292 /* 293 * atw_enable: 294 * 295 * Enable the ADM8211 chip. 296 */ 297 int 298 atw_enable(struct atw_softc *sc) 299 { 300 301 if (ATW_IS_ENABLED(sc) == 0) { 302 if (sc->sc_enable != NULL && (*sc->sc_enable)(sc) != 0) { 303 printf("%s: device enable failed\n", 304 sc->sc_dev.dv_xname); 305 return (EIO); 306 } 307 sc->sc_flags |= ATWF_ENABLED; 308 } 309 return (0); 310 } 311 312 /* 313 * atw_disable: 314 * 315 * Disable the ADM8211 chip. 316 */ 317 void 318 atw_disable(struct atw_softc *sc) 319 { 320 if (!ATW_IS_ENABLED(sc)) 321 return; 322 if (sc->sc_disable != NULL) 323 (*sc->sc_disable)(sc); 324 sc->sc_flags &= ~ATWF_ENABLED; 325 } 326 327 /* Returns -1 on failure. */ 328 int 329 atw_read_srom(struct atw_softc *sc) 330 { 331 struct seeprom_descriptor sd; 332 u_int32_t reg; 333 334 (void)memset(&sd, 0, sizeof(sd)); 335 336 reg = ATW_READ(sc, ATW_TEST0); 337 338 if ((reg & (ATW_TEST0_EPNE|ATW_TEST0_EPSNM)) != 0) { 339 printf("%s: bad or missing/bad SROM\n", sc->sc_dev.dv_xname); 340 return -1; 341 } 342 343 switch (reg & ATW_TEST0_EPTYP_MASK) { 344 case ATW_TEST0_EPTYP_93c66: 345 ATW_DPRINTF(("%s: 93c66 SROM\n", sc->sc_dev.dv_xname)); 346 sc->sc_sromsz = 512; 347 sd.sd_chip = C56_66; 348 break; 349 case ATW_TEST0_EPTYP_93c46: 350 ATW_DPRINTF(("%s: 93c46 SROM\n", sc->sc_dev.dv_xname)); 351 sc->sc_sromsz = 128; 352 sd.sd_chip = C46; 353 break; 354 default: 355 printf("%s: unknown SROM type %d\n", sc->sc_dev.dv_xname, 356 MASK_AND_RSHIFT(reg, ATW_TEST0_EPTYP_MASK)); 357 return -1; 358 } 359 360 sc->sc_srom = malloc(sc->sc_sromsz, M_DEVBUF, M_NOWAIT); 361 362 if (sc->sc_srom == NULL) { 363 printf("%s: unable to allocate SROM buffer\n", 364 sc->sc_dev.dv_xname); 365 return -1; 366 } 367 368 (void)memset(sc->sc_srom, 0, sc->sc_sromsz); 369 370 /* ADM8211 has a single 32-bit register for controlling the 371 * 93cx6 SROM. Bit SRS enables the serial port. There is no 372 * "ready" bit. The ADM8211 input/output sense is the reverse 373 * of read_seeprom's. 374 */ 375 sd.sd_tag = sc->sc_st; 376 sd.sd_bsh = sc->sc_sh; 377 sd.sd_regsize = 4; 378 sd.sd_control_offset = ATW_SPR; 379 sd.sd_status_offset = ATW_SPR; 380 sd.sd_dataout_offset = ATW_SPR; 381 sd.sd_CK = ATW_SPR_SCLK; 382 sd.sd_CS = ATW_SPR_SCS; 383 sd.sd_DI = ATW_SPR_SDO; 384 sd.sd_DO = ATW_SPR_SDI; 385 sd.sd_MS = ATW_SPR_SRS; 386 sd.sd_RDY = 0; 387 388 if (!read_seeprom(&sd, sc->sc_srom, 0, sc->sc_sromsz/2)) { 389 printf("%s: could not read SROM\n", sc->sc_dev.dv_xname); 390 free(sc->sc_srom, M_DEVBUF); 391 return -1; 392 } 393 #ifdef ATW_DEBUG 394 { 395 int i; 396 ATW_DPRINTF(("\nSerial EEPROM:\n\t")); 397 for (i = 0; i < sc->sc_sromsz/2; i = i + 1) { 398 if (((i % 8) == 0) && (i != 0)) { 399 ATW_DPRINTF(("\n\t")); 400 } 401 ATW_DPRINTF((" 0x%x", sc->sc_srom[i])); 402 } 403 ATW_DPRINTF(("\n")); 404 } 405 #endif /* ATW_DEBUG */ 406 return 0; 407 } 408 409 #ifdef ATW_DEBUG 410 static void 411 atw_print_regs(struct atw_softc *sc, const char *where) 412 { 413 #define PRINTREG(sc, reg) \ 414 ATW_DPRINTF2(("%s: reg[ " #reg " / %03x ] = %08x\n", \ 415 sc->sc_dev.dv_xname, reg, ATW_READ(sc, reg))) 416 417 ATW_DPRINTF2(("%s: %s\n", sc->sc_dev.dv_xname, where)); 418 419 PRINTREG(sc, ATW_PAR); 420 PRINTREG(sc, ATW_FRCTL); 421 PRINTREG(sc, ATW_TDR); 422 PRINTREG(sc, ATW_WTDP); 423 PRINTREG(sc, ATW_RDR); 424 PRINTREG(sc, ATW_WRDP); 425 PRINTREG(sc, ATW_RDB); 426 PRINTREG(sc, ATW_CSR3A); 427 PRINTREG(sc, ATW_TDBD); 428 PRINTREG(sc, ATW_TDBP); 429 PRINTREG(sc, ATW_STSR); 430 PRINTREG(sc, ATW_CSR5A); 431 PRINTREG(sc, ATW_NAR); 432 PRINTREG(sc, ATW_CSR6A); 433 PRINTREG(sc, ATW_IER); 434 PRINTREG(sc, ATW_CSR7A); 435 PRINTREG(sc, ATW_LPC); 436 PRINTREG(sc, ATW_TEST1); 437 PRINTREG(sc, ATW_SPR); 438 PRINTREG(sc, ATW_TEST0); 439 PRINTREG(sc, ATW_WCSR); 440 PRINTREG(sc, ATW_WPDR); 441 PRINTREG(sc, ATW_GPTMR); 442 PRINTREG(sc, ATW_GPIO); 443 PRINTREG(sc, ATW_BBPCTL); 444 PRINTREG(sc, ATW_SYNCTL); 445 PRINTREG(sc, ATW_PLCPHD); 446 PRINTREG(sc, ATW_MMIWADDR); 447 PRINTREG(sc, ATW_MMIRADDR1); 448 PRINTREG(sc, ATW_MMIRADDR2); 449 PRINTREG(sc, ATW_TXBR); 450 PRINTREG(sc, ATW_CSR15A); 451 PRINTREG(sc, ATW_ALCSTAT); 452 PRINTREG(sc, ATW_TOFS2); 453 PRINTREG(sc, ATW_CMDR); 454 PRINTREG(sc, ATW_PCIC); 455 PRINTREG(sc, ATW_PMCSR); 456 PRINTREG(sc, ATW_PAR0); 457 PRINTREG(sc, ATW_PAR1); 458 PRINTREG(sc, ATW_MAR0); 459 PRINTREG(sc, ATW_MAR1); 460 PRINTREG(sc, ATW_ATIMDA0); 461 PRINTREG(sc, ATW_ABDA1); 462 PRINTREG(sc, ATW_BSSID0); 463 PRINTREG(sc, ATW_TXLMT); 464 PRINTREG(sc, ATW_MIBCNT); 465 PRINTREG(sc, ATW_BCNT); 466 PRINTREG(sc, ATW_TSFTH); 467 PRINTREG(sc, ATW_TSC); 468 PRINTREG(sc, ATW_SYNRF); 469 PRINTREG(sc, ATW_BPLI); 470 PRINTREG(sc, ATW_CAP0); 471 PRINTREG(sc, ATW_CAP1); 472 PRINTREG(sc, ATW_RMD); 473 PRINTREG(sc, ATW_CFPP); 474 PRINTREG(sc, ATW_TOFS0); 475 PRINTREG(sc, ATW_TOFS1); 476 PRINTREG(sc, ATW_IFST); 477 PRINTREG(sc, ATW_RSPT); 478 PRINTREG(sc, ATW_TSFTL); 479 PRINTREG(sc, ATW_WEPCTL); 480 PRINTREG(sc, ATW_WESK); 481 PRINTREG(sc, ATW_WEPCNT); 482 PRINTREG(sc, ATW_MACTEST); 483 PRINTREG(sc, ATW_FER); 484 PRINTREG(sc, ATW_FEMR); 485 PRINTREG(sc, ATW_FPSR); 486 PRINTREG(sc, ATW_FFER); 487 #undef PRINTREG 488 } 489 #endif /* ATW_DEBUG */ 490 491 /* 492 * Finish attaching an ADMtek ADM8211 MAC. Called by bus-specific front-end. 493 */ 494 void 495 atw_attach(struct atw_softc *sc) 496 { 497 static const u_int8_t empty_macaddr[IEEE80211_ADDR_LEN] = { 498 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 499 }; 500 struct ieee80211com *ic = &sc->sc_ic; 501 struct ifnet *ifp = &ic->ic_if; 502 int country_code, error, i, nrate; 503 u_int32_t reg; 504 static const char *type_strings[] = {"Intersil (not supported)", 505 "RFMD", "Marvel (not supported)"}; 506 507 sc->sc_txth = atw_txthresh_tab_lo; 508 509 SIMPLEQ_INIT(&sc->sc_txfreeq); 510 SIMPLEQ_INIT(&sc->sc_txdirtyq); 511 512 #ifdef ATW_DEBUG 513 atw_print_regs(sc, "atw_attach"); 514 #endif /* ATW_DEBUG */ 515 516 /* 517 * Allocate the control data structures, and create and load the 518 * DMA map for it. 519 */ 520 if ((error = bus_dmamem_alloc(sc->sc_dmat, 521 sizeof(struct atw_control_data), PAGE_SIZE, 0, &sc->sc_cdseg, 522 1, &sc->sc_cdnseg, 0)) != 0) { 523 printf("%s: unable to allocate control data, error = %d\n", 524 sc->sc_dev.dv_xname, error); 525 goto fail_0; 526 } 527 528 if ((error = bus_dmamem_map(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg, 529 sizeof(struct atw_control_data), (caddr_t *)&sc->sc_control_data, 530 BUS_DMA_COHERENT)) != 0) { 531 printf("%s: unable to map control data, error = %d\n", 532 sc->sc_dev.dv_xname, error); 533 goto fail_1; 534 } 535 536 if ((error = bus_dmamap_create(sc->sc_dmat, 537 sizeof(struct atw_control_data), 1, 538 sizeof(struct atw_control_data), 0, 0, &sc->sc_cddmamap)) != 0) { 539 printf("%s: unable to create control data DMA map, " 540 "error = %d\n", sc->sc_dev.dv_xname, error); 541 goto fail_2; 542 } 543 544 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 545 sc->sc_control_data, sizeof(struct atw_control_data), NULL, 546 0)) != 0) { 547 printf("%s: unable to load control data DMA map, error = %d\n", 548 sc->sc_dev.dv_xname, error); 549 goto fail_3; 550 } 551 552 /* 553 * Create the transmit buffer DMA maps. 554 */ 555 sc->sc_ntxsegs = ATW_NTXSEGS; 556 for (i = 0; i < ATW_TXQUEUELEN; i++) { 557 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 558 sc->sc_ntxsegs, MCLBYTES, 0, 0, 559 &sc->sc_txsoft[i].txs_dmamap)) != 0) { 560 printf("%s: unable to create tx DMA map %d, " 561 "error = %d\n", sc->sc_dev.dv_xname, i, error); 562 goto fail_4; 563 } 564 } 565 566 /* 567 * Create the receive buffer DMA maps. 568 */ 569 for (i = 0; i < ATW_NRXDESC; i++) { 570 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 571 MCLBYTES, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 572 printf("%s: unable to create rx DMA map %d, " 573 "error = %d\n", sc->sc_dev.dv_xname, i, error); 574 goto fail_5; 575 } 576 } 577 for (i = 0; i < ATW_NRXDESC; i++) { 578 sc->sc_rxsoft[i].rxs_mbuf = NULL; 579 } 580 581 /* Reset the chip to a known state. */ 582 atw_reset(sc); 583 584 if (atw_read_srom(sc) == -1) 585 return; 586 587 sc->sc_rftype = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CSR20], 588 ATW_SR_RFTYPE_MASK); 589 590 sc->sc_bbptype = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CSR20], 591 ATW_SR_BBPTYPE_MASK); 592 593 if (sc->sc_rftype > sizeof(type_strings)/sizeof(type_strings[0])) { 594 printf("%s: unknown RF\n", sc->sc_dev.dv_xname); 595 return; 596 } 597 if (sc->sc_bbptype > sizeof(type_strings)/sizeof(type_strings[0])) { 598 printf("%s: unknown BBP\n", sc->sc_dev.dv_xname); 599 return; 600 } 601 602 printf("%s: %s RF, %s BBP", sc->sc_dev.dv_xname, 603 type_strings[sc->sc_rftype], type_strings[sc->sc_bbptype]); 604 605 /* XXX There exists a Linux driver which seems to use RFType = 0 for 606 * MARVEL. My bug, or theirs? 607 */ 608 609 reg = LSHIFT(sc->sc_rftype, ATW_SYNCTL_RFTYPE_MASK); 610 611 switch (sc->sc_rftype) { 612 case ATW_RFTYPE_INTERSIL: 613 reg |= ATW_SYNCTL_CS1; 614 break; 615 case ATW_RFTYPE_RFMD: 616 reg |= ATW_SYNCTL_CS0; 617 break; 618 case ATW_RFTYPE_MARVEL: 619 break; 620 } 621 622 sc->sc_synctl_rd = reg | ATW_SYNCTL_RD; 623 sc->sc_synctl_wr = reg | ATW_SYNCTL_WR; 624 625 reg = LSHIFT(sc->sc_bbptype, ATW_BBPCTL_TYPE_MASK); 626 627 switch (sc->sc_bbptype) { 628 case ATW_RFTYPE_INTERSIL: 629 reg |= ATW_BBPCTL_TWI; 630 break; 631 case ATW_RFTYPE_RFMD: 632 reg |= ATW_BBPCTL_RF3KADDR_ADDR | ATW_BBPCTL_NEGEDGE_DO | 633 ATW_BBPCTL_CCA_ACTLO; 634 break; 635 case ATW_RFTYPE_MARVEL: 636 break; 637 } 638 639 sc->sc_bbpctl_wr = reg | ATW_BBPCTL_WR; 640 sc->sc_bbpctl_rd = reg | ATW_BBPCTL_RD; 641 642 /* 643 * From this point forward, the attachment cannot fail. A failure 644 * before this point releases all resources that may have been 645 * allocated. 646 */ 647 sc->sc_flags |= ATWF_ATTACHED /* | ATWF_RTSCTS */; 648 649 ATW_DPRINTF((" SROM MAC %04x%04x%04x", 650 htole16(sc->sc_srom[ATW_SR_MAC00]), 651 htole16(sc->sc_srom[ATW_SR_MAC01]), 652 htole16(sc->sc_srom[ATW_SR_MAC10]))); 653 654 country_code = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CTRY_CR29], 655 ATW_SR_CTRY_MASK); 656 657 #define ADD_CHANNEL(_ic, _chan) do { \ 658 _ic->ic_channels[_chan].ic_flags = IEEE80211_CHAN_B; \ 659 _ic->ic_channels[_chan].ic_freq = \ 660 ieee80211_ieee2mhz(_chan, _ic->ic_channels[_chan].ic_flags);\ 661 } while (0) 662 663 /* Find available channels */ 664 switch (country_code) { 665 case COUNTRY_MMK2: /* 1-14 */ 666 ADD_CHANNEL(ic, 14); 667 /*FALLTHROUGH*/ 668 case COUNTRY_ETSI: /* 1-13 */ 669 for (i = 1; i <= 13; i++) 670 ADD_CHANNEL(ic, i); 671 break; 672 case COUNTRY_FCC: /* 1-11 */ 673 case COUNTRY_IC: /* 1-11 */ 674 for (i = 1; i <= 11; i++) 675 ADD_CHANNEL(ic, i); 676 break; 677 case COUNTRY_MMK: /* 14 */ 678 ADD_CHANNEL(ic, 14); 679 break; 680 case COUNTRY_FRANCE: /* 10-13 */ 681 for (i = 10; i <= 13; i++) 682 ADD_CHANNEL(ic, i); 683 break; 684 default: /* assume channels 10-11 */ 685 case COUNTRY_SPAIN: /* 10-11 */ 686 for (i = 10; i <= 11; i++) 687 ADD_CHANNEL(ic, i); 688 break; 689 } 690 691 /* Read the MAC address. */ 692 reg = ATW_READ(sc, ATW_PAR0); 693 ic->ic_myaddr[0] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB0_MASK); 694 ic->ic_myaddr[1] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB1_MASK); 695 ic->ic_myaddr[2] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB2_MASK); 696 ic->ic_myaddr[3] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB3_MASK); 697 reg = ATW_READ(sc, ATW_PAR1); 698 ic->ic_myaddr[4] = MASK_AND_RSHIFT(reg, ATW_PAR1_PAB4_MASK); 699 ic->ic_myaddr[5] = MASK_AND_RSHIFT(reg, ATW_PAR1_PAB5_MASK); 700 701 if (IEEE80211_ADDR_EQ(ic->ic_myaddr, empty_macaddr)) { 702 printf(" could not get mac address, attach failed\n"); 703 return; 704 } 705 706 printf(" 802.11 address %s\n", ether_sprintf(ic->ic_myaddr)); 707 708 memcpy(ifp->if_xname, sc->sc_dev.dv_xname, IFNAMSIZ); 709 ifp->if_softc = sc; 710 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST | 711 IFF_NOTRAILERS; 712 ifp->if_ioctl = atw_ioctl; 713 ifp->if_start = atw_start; 714 ifp->if_watchdog = atw_watchdog; 715 ifp->if_init = atw_init; 716 ifp->if_stop = atw_stop; 717 IFQ_SET_READY(&ifp->if_snd); 718 719 ic->ic_phytype = IEEE80211_T_DS; 720 ic->ic_opmode = IEEE80211_M_STA; 721 ic->ic_caps = IEEE80211_C_PMGT | IEEE80211_C_IBSS | 722 IEEE80211_C_HOSTAP | IEEE80211_C_MONITOR | IEEE80211_C_WEP; 723 724 nrate = 0; 725 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 2; 726 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 4; 727 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 11; 728 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 22; 729 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_nrates = nrate; 730 731 /* 732 * Call MI attach routines. 733 */ 734 735 if_attach(ifp); 736 ieee80211_ifattach(ifp); 737 738 sc->sc_newstate = ic->ic_newstate; 739 ic->ic_newstate = atw_newstate; 740 741 sc->sc_recv_mgmt = ic->ic_recv_mgmt; 742 ic->ic_recv_mgmt = atw_recv_mgmt; 743 744 sc->sc_node_free = ic->ic_node_free; 745 ic->ic_node_free = atw_node_free; 746 747 sc->sc_node_alloc = ic->ic_node_alloc; 748 ic->ic_node_alloc = atw_node_alloc; 749 750 /* possibly we should fill in our own sc_send_prresp, since 751 * the ADM8211 is probably sending probe responses in ad hoc 752 * mode. 753 */ 754 755 /* complete initialization */ 756 ieee80211_media_init(ifp, atw_media_change, atw_media_status); 757 callout_init(&sc->sc_scan_ch); 758 759 #if NBPFILTER > 0 760 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 761 sizeof(struct ieee80211_frame) + 64, &sc->sc_radiobpf); 762 #endif 763 764 /* 765 * Make sure the interface is shutdown during reboot. 766 */ 767 sc->sc_sdhook = shutdownhook_establish(atw_shutdown, sc); 768 if (sc->sc_sdhook == NULL) 769 printf("%s: WARNING: unable to establish shutdown hook\n", 770 sc->sc_dev.dv_xname); 771 772 /* 773 * Add a suspend hook to make sure we come back up after a 774 * resume. 775 */ 776 sc->sc_powerhook = powerhook_establish(atw_power, sc); 777 if (sc->sc_powerhook == NULL) 778 printf("%s: WARNING: unable to establish power hook\n", 779 sc->sc_dev.dv_xname); 780 781 memset(&sc->sc_rxtapu, 0, sizeof(sc->sc_rxtapu)); 782 sc->sc_rxtap.ar_ihdr.it_len = sizeof(sc->sc_rxtapu); 783 sc->sc_rxtap.ar_ihdr.it_present = ATW_RX_RADIOTAP_PRESENT; 784 785 memset(&sc->sc_txtapu, 0, sizeof(sc->sc_txtapu)); 786 sc->sc_txtap.at_ihdr.it_len = sizeof(sc->sc_txtapu); 787 sc->sc_txtap.at_ihdr.it_present = ATW_TX_RADIOTAP_PRESENT; 788 789 return; 790 791 /* 792 * Free any resources we've allocated during the failed attach 793 * attempt. Do this in reverse order and fall through. 794 */ 795 fail_5: 796 for (i = 0; i < ATW_NRXDESC; i++) { 797 if (sc->sc_rxsoft[i].rxs_dmamap == NULL) 798 continue; 799 bus_dmamap_destroy(sc->sc_dmat, sc->sc_rxsoft[i].rxs_dmamap); 800 } 801 fail_4: 802 for (i = 0; i < ATW_TXQUEUELEN; i++) { 803 if (sc->sc_txsoft[i].txs_dmamap == NULL) 804 continue; 805 bus_dmamap_destroy(sc->sc_dmat, sc->sc_txsoft[i].txs_dmamap); 806 } 807 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 808 fail_3: 809 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 810 fail_2: 811 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 812 sizeof(struct atw_control_data)); 813 fail_1: 814 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 815 fail_0: 816 return; 817 } 818 819 static struct ieee80211_node * 820 atw_node_alloc(struct ieee80211com *ic) 821 { 822 struct atw_softc *sc = (struct atw_softc *)ic->ic_if.if_softc; 823 struct ieee80211_node *ni = (*sc->sc_node_alloc)(ic); 824 825 DPRINTF(sc, ("%s: alloc node %p\n", sc->sc_dev.dv_xname, ni)); 826 return ni; 827 } 828 829 static void 830 atw_node_free(struct ieee80211com *ic, struct ieee80211_node *ni) 831 { 832 struct atw_softc *sc = (struct atw_softc *)ic->ic_if.if_softc; 833 834 DPRINTF(sc, ("%s: freeing node %p %s\n", sc->sc_dev.dv_xname, ni, 835 ether_sprintf(ni->ni_bssid))); 836 (*sc->sc_node_free)(ic, ni); 837 } 838 839 /* 840 * atw_reset: 841 * 842 * Perform a soft reset on the ADM8211. 843 */ 844 void 845 atw_reset(struct atw_softc *sc) 846 { 847 int i; 848 849 if (ATW_IS_ENABLED(sc) == 0) 850 return; 851 852 ATW_WRITE(sc, ATW_PAR, ATW_PAR_SWR); 853 854 for (i = 0; i < 10000; i++) { 855 if (ATW_ISSET(sc, ATW_PAR, ATW_PAR_SWR) == 0) 856 break; 857 DELAY(1); 858 } 859 860 DPRINTF2(sc, ("%s: atw_reset %d iterations\n", sc->sc_dev.dv_xname, i)); 861 862 if (ATW_ISSET(sc, ATW_PAR, ATW_PAR_SWR)) 863 printf("%s: reset failed to complete\n", sc->sc_dev.dv_xname); 864 865 /* Turn off maximum power saving. */ 866 ATW_CLR(sc, ATW_FRCTL, ATW_FRCTL_MAXPSP); 867 868 /* Recall EEPROM. */ 869 ATW_SET(sc, ATW_TEST0, ATW_TEST0_EPRLD); 870 871 DELAY(10 * 1000); 872 873 /* A reset seems to affect the SRAM contents, so put them into 874 * a known state. 875 */ 876 atw_clear_sram(sc); 877 878 memset(sc->sc_bssid, 0, sizeof(sc->sc_bssid)); 879 880 sc->sc_lost_bcn_thresh = 0; 881 } 882 883 static void 884 atw_clear_sram(struct atw_softc *sc) 885 { 886 #if 0 887 for (addr = 0; addr < 448; addr++) { 888 ATW_WRITE(sc, ATW_WEPCTL, 889 ATW_WEPCTL_WR | ATW_WEPCTL_UNKNOWN0 | addr); 890 DELAY(1000); 891 ATW_WRITE(sc, ATW_WESK, 0); 892 DELAY(1000); /* paranoia */ 893 } 894 return; 895 #endif 896 memset(sc->sc_sram, 0, sizeof(sc->sc_sram)); 897 /* XXX not for revision 0x20. */ 898 atw_write_sram(sc, 0, sc->sc_sram, sizeof(sc->sc_sram)); 899 } 900 901 /* TBD atw_init 902 * 903 * set MAC based on ic->ic_bss->myaddr 904 * write WEP keys 905 * set TX rate 906 */ 907 908 /* 909 * atw_init: [ ifnet interface function ] 910 * 911 * Initialize the interface. Must be called at splnet(). 912 */ 913 int 914 atw_init(struct ifnet *ifp) 915 { 916 struct atw_softc *sc = ifp->if_softc; 917 struct ieee80211com *ic = &sc->sc_ic; 918 struct atw_txsoft *txs; 919 struct atw_rxsoft *rxs; 920 u_int32_t reg; 921 int i, error = 0; 922 923 if ((error = atw_enable(sc)) != 0) 924 goto out; 925 926 /* 927 * Cancel any pending I/O. This also resets. 928 */ 929 atw_stop(ifp, 0); 930 931 ic->ic_bss->ni_chan = ic->ic_ibss_chan; 932 DPRINTF(sc, ("%s: channel %d freq %d flags 0x%04x\n", 933 __func__, ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 934 ic->ic_bss->ni_chan->ic_freq, ic->ic_bss->ni_chan->ic_flags)); 935 936 /* Turn off APM??? (A binary-only driver does this.) 937 * 938 * Set Rx store-and-forward mode. 939 */ 940 reg = ATW_READ(sc, ATW_CMDR); 941 reg &= ~ATW_CMDR_APM; 942 reg &= ~ATW_CMDR_DRT_MASK; 943 reg |= ATW_CMDR_RTE | LSHIFT(0x2, ATW_CMDR_DRT_MASK); 944 945 ATW_WRITE(sc, ATW_CMDR, reg); 946 947 /* Set data rate for PLCP Signal field, 1Mbps = 10 x 100Kb/s. 948 * 949 * XXX a binary-only driver sets a different service field than 950 * 0. why? 951 */ 952 reg = ATW_READ(sc, ATW_PLCPHD); 953 reg &= ~(ATW_PLCPHD_SERVICE_MASK|ATW_PLCPHD_SIGNAL_MASK); 954 reg |= LSHIFT(10, ATW_PLCPHD_SIGNAL_MASK) | 955 LSHIFT(0xb0, ATW_PLCPHD_SERVICE_MASK); 956 ATW_WRITE(sc, ATW_PLCPHD, reg); 957 958 /* XXX this magic can probably be figured out from the RFMD docs */ 959 reg = LSHIFT(4, ATW_TOFS2_PWR1UP_MASK) | /* 8 ms = 4 * 2 ms */ 960 LSHIFT(13, ATW_TOFS2_PWR0PAPE_MASK) | /* 13 us */ 961 LSHIFT(8, ATW_TOFS2_PWR1PAPE_MASK) | /* 8 us */ 962 LSHIFT(5, ATW_TOFS2_PWR0TRSW_MASK) | /* 5 us */ 963 LSHIFT(12, ATW_TOFS2_PWR1TRSW_MASK) | /* 12 us */ 964 LSHIFT(13, ATW_TOFS2_PWR0PE2_MASK) | /* 13 us */ 965 LSHIFT(4, ATW_TOFS2_PWR1PE2_MASK) | /* 4 us */ 966 LSHIFT(5, ATW_TOFS2_PWR0TXPE_MASK); /* 5 us */ 967 ATW_WRITE(sc, ATW_TOFS2, reg); 968 969 ATW_WRITE(sc, ATW_TXLMT, LSHIFT(512, ATW_TXLMT_MTMLT_MASK) | 970 LSHIFT(224, ATW_TXLMT_SRTYLIM_MASK)); 971 972 /* XXX this resets an Intersil RF front-end? */ 973 /* TBD condition on Intersil RFType? */ 974 ATW_WRITE(sc, ATW_SYNRF, ATW_SYNRF_INTERSIL_EN); 975 DELAY(10 * 1000); 976 ATW_WRITE(sc, ATW_SYNRF, 0); 977 DELAY(5 * 1000); 978 979 /* 16 TU max duration for contention-free period */ 980 reg = ATW_READ(sc, ATW_CFPP) & ~ATW_CFPP_CFPMD; 981 ATW_WRITE(sc, ATW_CFPP, reg | LSHIFT(16, ATW_CFPP_CFPMD)); 982 983 /* XXX I guess that the Cardbus clock is 22MHz? 984 * I am assuming that the role of ATW_TOFS0_USCNT is 985 * to divide the bus clock to get a 1MHz clock---the datasheet is not 986 * very clear on this point. It says in the datasheet that it is 987 * possible for the ADM8211 to accomodate bus speeds between 22MHz 988 * and 33MHz; maybe this is the way? I see a binary-only driver write 989 * these values. These values are also the power-on default. 990 */ 991 ATW_WRITE(sc, ATW_TOFS0, 992 LSHIFT(22, ATW_TOFS0_USCNT_MASK) | 993 ATW_TOFS0_TUCNT_MASK /* set all bits in TUCNT */); 994 995 /* Initialize interframe spacing. EIFS=0x64 is used by a binary-only 996 * driver. Go figure. 997 */ 998 reg = LSHIFT(IEEE80211_DUR_DS_SLOT, ATW_IFST_SLOT_MASK) | 999 LSHIFT(22 * IEEE80211_DUR_DS_SIFS /* # of 22MHz cycles */, 1000 ATW_IFST_SIFS_MASK) | 1001 LSHIFT(IEEE80211_DUR_DS_DIFS, ATW_IFST_DIFS_MASK) | 1002 LSHIFT(0x64 /* IEEE80211_DUR_DS_EIFS */, ATW_IFST_EIFS_MASK); 1003 1004 ATW_WRITE(sc, ATW_IFST, reg); 1005 1006 /* XXX More magic. Might relate to ACK timing. */ 1007 ATW_WRITE(sc, ATW_RSPT, LSHIFT(0xffff, ATW_RSPT_MART_MASK) | 1008 LSHIFT(0xff, ATW_RSPT_MIRT_MASK)); 1009 1010 /* Set up the MMI read/write addresses for the BBP. 1011 * 1012 * TBD find out the Marvel settings. 1013 */ 1014 switch (sc->sc_bbptype) { 1015 case ATW_BBPTYPE_INTERSIL: 1016 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_INTERSIL); 1017 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_INTERSIL); 1018 ATW_WRITE(sc, ATW_MMIRADDR2, ATW_MMIRADDR2_INTERSIL); 1019 break; 1020 case ATW_BBPTYPE_MARVEL: 1021 break; 1022 case ATW_BBPTYPE_RFMD: 1023 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_RFMD); 1024 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_RFMD); 1025 ATW_WRITE(sc, ATW_MMIRADDR2, ATW_MMIRADDR2_RFMD); 1026 default: 1027 break; 1028 } 1029 1030 sc->sc_wepctl = 0; 1031 ATW_WRITE(sc, ATW_MACTEST, ATW_MACTEST_MMI_USETXCLK); 1032 1033 if ((error = atw_rf3000_init(sc)) != 0) 1034 goto out; 1035 1036 /* 1037 * Initialize the PCI Access Register. 1038 */ 1039 sc->sc_busmode = ATW_PAR_BAR; /* XXX what is this? */ 1040 1041 /* 1042 * If we're allowed to do so, use Memory Read Line 1043 * and Memory Read Multiple. 1044 * 1045 * XXX Should we use Memory Write and Invalidate? 1046 */ 1047 if (sc->sc_flags & ATWF_MRL) 1048 sc->sc_busmode |= ATW_PAR_MRLE; 1049 if (sc->sc_flags & ATWF_MRM) 1050 sc->sc_busmode |= ATW_PAR_MRME; 1051 if (sc->sc_flags & ATWF_MWI) 1052 sc->sc_busmode |= ATW_PAR_MWIE; 1053 if (sc->sc_maxburst == 0) 1054 sc->sc_maxburst = 8; /* ADM8211 default */ 1055 1056 switch (sc->sc_cacheline) { 1057 default: 1058 /* Use burst length. */ 1059 break; 1060 case 8: 1061 sc->sc_busmode |= ATW_PAR_CAL_8DW; 1062 break; 1063 case 16: 1064 sc->sc_busmode |= ATW_PAR_CAL_16DW; 1065 break; 1066 case 32: 1067 sc->sc_busmode |= ATW_PAR_CAL_32DW; 1068 break; 1069 } 1070 switch (sc->sc_maxburst) { 1071 case 1: 1072 sc->sc_busmode |= ATW_PAR_PBL_1DW; 1073 break; 1074 case 2: 1075 sc->sc_busmode |= ATW_PAR_PBL_2DW; 1076 break; 1077 case 4: 1078 sc->sc_busmode |= ATW_PAR_PBL_4DW; 1079 break; 1080 case 8: 1081 sc->sc_busmode |= ATW_PAR_PBL_8DW; 1082 break; 1083 case 16: 1084 sc->sc_busmode |= ATW_PAR_PBL_16DW; 1085 break; 1086 case 32: 1087 sc->sc_busmode |= ATW_PAR_PBL_32DW; 1088 break; 1089 default: 1090 sc->sc_busmode |= ATW_PAR_PBL_8DW; 1091 break; 1092 } 1093 1094 ATW_WRITE(sc, ATW_PAR, sc->sc_busmode); 1095 DPRINTF(sc, ("%s: ATW_PAR %08x busmode %08x\n", sc->sc_dev.dv_xname, 1096 ATW_READ(sc, ATW_PAR), sc->sc_busmode)); 1097 1098 /* 1099 * Initialize the OPMODE register. We don't write it until 1100 * we're ready to begin the transmit and receive processes. 1101 */ 1102 sc->sc_opmode = ATW_NAR_SR | ATW_NAR_ST | 1103 sc->sc_txth[sc->sc_txthresh].txth_opmode; 1104 1105 /* 1106 * Initialize the transmit descriptor ring. 1107 */ 1108 memset(sc->sc_txdescs, 0, sizeof(sc->sc_txdescs)); 1109 for (i = 0; i < ATW_NTXDESC; i++) { 1110 /* no transmit chaining */ 1111 sc->sc_txdescs[i].at_ctl = 0 /* ATW_TXFLAG_TCH */; 1112 sc->sc_txdescs[i].at_buf2 = 1113 htole32(ATW_CDTXADDR(sc, ATW_NEXTTX(i))); 1114 } 1115 /* use ring mode */ 1116 sc->sc_txdescs[ATW_NTXDESC - 1].at_ctl |= ATW_TXFLAG_TER; 1117 ATW_CDTXSYNC(sc, 0, ATW_NTXDESC, 1118 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 1119 sc->sc_txfree = ATW_NTXDESC; 1120 sc->sc_txnext = 0; 1121 1122 /* 1123 * Initialize the transmit job descriptors. 1124 */ 1125 SIMPLEQ_INIT(&sc->sc_txfreeq); 1126 SIMPLEQ_INIT(&sc->sc_txdirtyq); 1127 for (i = 0; i < ATW_TXQUEUELEN; i++) { 1128 txs = &sc->sc_txsoft[i]; 1129 txs->txs_mbuf = NULL; 1130 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 1131 } 1132 1133 /* 1134 * Initialize the receive descriptor and receive job 1135 * descriptor rings. 1136 */ 1137 for (i = 0; i < ATW_NRXDESC; i++) { 1138 rxs = &sc->sc_rxsoft[i]; 1139 if (rxs->rxs_mbuf == NULL) { 1140 if ((error = atw_add_rxbuf(sc, i)) != 0) { 1141 printf("%s: unable to allocate or map rx " 1142 "buffer %d, error = %d\n", 1143 sc->sc_dev.dv_xname, i, error); 1144 /* 1145 * XXX Should attempt to run with fewer receive 1146 * XXX buffers instead of just failing. 1147 */ 1148 atw_rxdrain(sc); 1149 goto out; 1150 } 1151 } else 1152 ATW_INIT_RXDESC(sc, i); 1153 } 1154 sc->sc_rxptr = 0; 1155 1156 /* disable all wake-up events */ 1157 ATW_CLR(sc, ATW_WCSR, ATW_WCSR_WP1E|ATW_WCSR_WP2E|ATW_WCSR_WP3E| 1158 ATW_WCSR_WP4E|ATW_WCSR_WP5E|ATW_WCSR_TSFTWE| 1159 ATW_WCSR_TIMWE|ATW_WCSR_ATIMWE|ATW_WCSR_KEYWE| 1160 ATW_WCSR_WFRE|ATW_WCSR_MPRE|ATW_WCSR_LSOE); 1161 1162 /* ack all wake-up events */ 1163 ATW_SET(sc, ATW_WCSR, 0); 1164 1165 /* 1166 * Initialize the interrupt mask and enable interrupts. 1167 */ 1168 /* normal interrupts */ 1169 sc->sc_inten = ATW_INTR_TCI | ATW_INTR_TDU | ATW_INTR_RCI | 1170 ATW_INTR_NISS | ATW_INTR_LINKON | ATW_INTR_BCNTC; 1171 1172 /* abnormal interrupts */ 1173 sc->sc_inten |= ATW_INTR_TPS | ATW_INTR_TLT | ATW_INTR_TRT | 1174 ATW_INTR_TUF | ATW_INTR_RDU | ATW_INTR_RPS | ATW_INTR_AISS | 1175 ATW_INTR_FBE | ATW_INTR_LINKOFF | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1176 1177 sc->sc_linkint_mask = ATW_INTR_LINKON | ATW_INTR_LINKOFF | 1178 ATW_INTR_BCNTC | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1179 sc->sc_rxint_mask = ATW_INTR_RCI | ATW_INTR_RDU; 1180 sc->sc_txint_mask = ATW_INTR_TCI | ATW_INTR_TUF | ATW_INTR_TLT | 1181 ATW_INTR_TRT; 1182 1183 sc->sc_linkint_mask &= sc->sc_inten; 1184 sc->sc_rxint_mask &= sc->sc_inten; 1185 sc->sc_txint_mask &= sc->sc_inten; 1186 1187 ATW_WRITE(sc, ATW_IER, sc->sc_inten); 1188 ATW_WRITE(sc, ATW_STSR, 0xffffffff); 1189 if (sc->sc_intr_ack != NULL) 1190 (*sc->sc_intr_ack)(sc); 1191 1192 DPRINTF(sc, ("%s: ATW_IER %08x, inten %08x\n", 1193 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_IER), sc->sc_inten)); 1194 1195 /* 1196 * Give the transmit and receive rings to the ADM8211. 1197 */ 1198 ATW_WRITE(sc, ATW_TDBD, ATW_CDTXADDR(sc, sc->sc_txnext)); 1199 ATW_WRITE(sc, ATW_RDB, ATW_CDRXADDR(sc, sc->sc_rxptr)); 1200 1201 /* common 802.11 configuration */ 1202 ic->ic_flags &= ~IEEE80211_F_IBSSON; 1203 switch (ic->ic_opmode) { 1204 case IEEE80211_M_STA: 1205 sc->sc_opmode &= ~ATW_NAR_EA; 1206 break; 1207 case IEEE80211_M_AHDEMO: /* XXX */ 1208 case IEEE80211_M_IBSS: 1209 ic->ic_flags |= IEEE80211_F_IBSSON; 1210 /*FALLTHROUGH*/ 1211 case IEEE80211_M_HOSTAP: /* XXX */ 1212 /* EA bit seems important for ad hoc reception. */ 1213 sc->sc_opmode |= ATW_NAR_EA; 1214 break; 1215 case IEEE80211_M_MONITOR: /* XXX */ 1216 break; 1217 } 1218 1219 atw_start_beacon(sc, 0); 1220 1221 switch (ic->ic_opmode) { 1222 case IEEE80211_M_AHDEMO: 1223 case IEEE80211_M_HOSTAP: 1224 ic->ic_bss->ni_intval = ic->ic_lintval; 1225 ic->ic_bss->ni_rssi = 0; 1226 ic->ic_bss->ni_rstamp = 0; 1227 break; 1228 default: /* XXX */ 1229 break; 1230 } 1231 1232 atw_write_ssid(sc); 1233 atw_write_sup_rates(sc); 1234 if (ic->ic_caps & IEEE80211_C_WEP) 1235 atw_write_wep(sc); 1236 1237 /* 1238 * Set the receive filter. This will start the transmit and 1239 * receive processes. 1240 */ 1241 atw_filter_setup(sc); 1242 1243 /* 1244 * Start the receive process. 1245 */ 1246 ATW_WRITE(sc, ATW_RDR, 0x1); 1247 1248 /* 1249 * Note that the interface is now running. 1250 */ 1251 ifp->if_flags |= IFF_RUNNING; 1252 ifp->if_flags &= ~IFF_OACTIVE; 1253 ic->ic_state = IEEE80211_S_INIT; 1254 1255 if (ic->ic_opmode != IEEE80211_M_MONITOR) 1256 error = ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 1257 else 1258 error = ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 1259 out: 1260 if (error) { 1261 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1262 ifp->if_timer = 0; 1263 printf("%s: interface not running\n", sc->sc_dev.dv_xname); 1264 } 1265 #ifdef ATW_DEBUG 1266 atw_print_regs(sc, "end of init"); 1267 #endif /* ATW_DEBUG */ 1268 1269 return (error); 1270 } 1271 1272 /* enable == 1: host control of RF3000/Si4126 through ATW_SYNCTL. 1273 * 0: MAC control of RF3000/Si4126. 1274 * 1275 * Applies power, or selects RF front-end? Sets reset condition. 1276 * 1277 * TBD support non-RFMD BBP, non-SiLabs synth. 1278 */ 1279 static void 1280 atw_rfio_enable(struct atw_softc *sc, int enable) 1281 { 1282 if (enable) { 1283 ATW_WRITE(sc, ATW_SYNRF, 1284 ATW_SYNRF_SELRF|ATW_SYNRF_PE1|ATW_SYNRF_PHYRST); 1285 DELAY(atw_rfio_enable_delay); 1286 } else { 1287 ATW_WRITE(sc, ATW_SYNRF, 0); 1288 DELAY(atw_rfio_disable_delay); /* shorter for some reason */ 1289 } 1290 } 1291 1292 static int 1293 atw_tune(struct atw_softc *sc) 1294 { 1295 int rc; 1296 u_int32_t reg; 1297 int chan; 1298 struct ieee80211com *ic = &sc->sc_ic; 1299 1300 chan = ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan); 1301 if (chan == IEEE80211_CHAN_ANY) 1302 panic("%s: chan == IEEE80211_CHAN_ANY\n", __func__); 1303 1304 if (chan == sc->sc_cur_chan) 1305 return 0; 1306 1307 DPRINTF(sc, ("%s: chan %d -> %d\n", sc->sc_dev.dv_xname, 1308 sc->sc_cur_chan, chan)); 1309 1310 atw_idle(sc, ATW_NAR_SR|ATW_NAR_ST); 1311 1312 if ((rc = atw_si4126_tune(sc, chan)) != 0 || 1313 (rc = atw_rf3000_tune(sc, chan)) != 0) 1314 printf("%s: failed to tune channel %d\n", sc->sc_dev.dv_xname, 1315 chan); 1316 1317 reg = ATW_READ(sc, ATW_CAP0) & ~ATW_CAP0_CHN_MASK; 1318 ATW_WRITE(sc, ATW_CAP0, 1319 reg | LSHIFT(chan, ATW_CAP0_CHN_MASK)); 1320 1321 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1322 1323 if (rc == 0) 1324 sc->sc_cur_chan = chan; 1325 1326 return rc; 1327 } 1328 1329 #ifdef ATW_DEBUG 1330 static void 1331 atw_si4126_print(struct atw_softc *sc) 1332 { 1333 struct ifnet *ifp = &sc->sc_ic.ic_if; 1334 u_int addr, val; 1335 1336 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1337 return; 1338 1339 for (addr = 0; addr <= 8; addr++) { 1340 printf("%s: synth[%d] = ", sc->sc_dev.dv_xname, addr); 1341 if (atw_si4126_read(sc, addr, &val) == 0) { 1342 printf("<unknown> (quitting print-out)\n"); 1343 break; 1344 } 1345 printf("%05x\n", val); 1346 } 1347 } 1348 #endif /* ATW_DEBUG */ 1349 1350 /* Tune to channel chan by adjusting the Si4126 RF/IF synthesizer. 1351 * 1352 * The RF/IF synthesizer produces two reference frequencies for 1353 * the RF2948B transceiver. The first frequency the RF2948B requires 1354 * is two times the so-called "intermediate frequency" (IF). Since 1355 * a SAW filter on the radio fixes the IF at 374MHz, I program the 1356 * Si4126 to generate IF LO = 374MHz x 2 = 748MHz. The second 1357 * frequency required by the transceiver is the radio frequency 1358 * (RF). This is a superheterodyne transceiver; for f(chan) the 1359 * center frequency of the channel we are tuning, RF = f(chan) - 1360 * IF. 1361 * 1362 * XXX I am told by SiLabs that the Si4126 will accept a broader range 1363 * of XIN than the 2-25MHz mentioned by the datasheet, even *without* 1364 * XINDIV2 = 1. I've tried this (it is necessary to double R) and it 1365 * works, but I have still programmed for XINDIV2 = 1 to be safe. 1366 */ 1367 static int 1368 atw_si4126_tune(struct atw_softc *sc, u_int8_t chan) 1369 { 1370 int rc = 0; 1371 u_int mhz; 1372 u_int R; 1373 u_int32_t reg; 1374 u_int16_t gain; 1375 1376 #ifdef ATW_DEBUG 1377 atw_si4126_print(sc); 1378 #endif /* ATW_DEBUG */ 1379 1380 if (chan == 14) 1381 mhz = 2484; 1382 else 1383 mhz = 2412 + 5 * (chan - 1); 1384 1385 /* Tune IF to 748MHz to suit the IF LO input of the 1386 * RF2494B, which is 2 x IF. No need to set an IF divider 1387 * because an IF in 526MHz - 952MHz is allowed. 1388 * 1389 * XIN is 44.000MHz, so divide it by two to get allowable 1390 * range of 2-25MHz. SiLabs tells me that this is not 1391 * strictly necessary. 1392 */ 1393 1394 R = 44; 1395 1396 atw_rfio_enable(sc, 1); 1397 1398 /* Power-up RF, IF synthesizers. */ 1399 if ((rc = atw_si4126_write(sc, SI4126_POWER, 1400 SI4126_POWER_PDIB|SI4126_POWER_PDRB)) != 0) 1401 goto out; 1402 1403 /* If RF2 N > 2047, then set KP2 to 1. */ 1404 gain = LSHIFT(((mhz - 374) > 2047) ? 1 : 0, SI4126_GAIN_KP2_MASK); 1405 1406 if ((rc = atw_si4126_write(sc, SI4126_GAIN, gain)) != 0) 1407 goto out; 1408 1409 /* set LPWR, too? */ 1410 if ((rc = atw_si4126_write(sc, SI4126_MAIN, 1411 SI4126_MAIN_XINDIV2)) != 0) 1412 goto out; 1413 1414 /* We set XINDIV2 = 1, so IF = N/(2 * R) * XIN. XIN = 44MHz. 1415 * I choose N = 1496, R = 44 so that 1496/(2 * 44) * 44MHz = 748MHz. 1416 */ 1417 if ((rc = atw_si4126_write(sc, SI4126_IFN, 1496)) != 0) 1418 goto out; 1419 1420 if ((rc = atw_si4126_write(sc, SI4126_IFR, R)) != 0) 1421 goto out; 1422 1423 /* Set RF1 arbitrarily. DO NOT configure RF1 after RF2, because 1424 * then RF1 becomes the active RF synthesizer, even on the Si4126, 1425 * which has no RF1! 1426 */ 1427 if ((rc = atw_si4126_write(sc, SI4126_RF1R, R)) != 0) 1428 goto out; 1429 1430 if ((rc = atw_si4126_write(sc, SI4126_RF1N, mhz - 374)) != 0) 1431 goto out; 1432 1433 /* N/R * XIN = RF. XIN = 44MHz. We desire RF = mhz - IF, 1434 * where IF = 374MHz. Let's divide XIN to 1MHz. So R = 44. 1435 * Now let's multiply it to mhz. So mhz - IF = N. 1436 */ 1437 if ((rc = atw_si4126_write(sc, SI4126_RF2R, R)) != 0) 1438 goto out; 1439 1440 if ((rc = atw_si4126_write(sc, SI4126_RF2N, mhz - 374)) != 0) 1441 goto out; 1442 1443 /* wait 100us from power-up for RF, IF to settle */ 1444 DELAY(100); 1445 1446 if ((sc->sc_if.if_flags & IFF_LINK1) == 0 || chan == 14) { 1447 /* XXX there is a binary driver which sends 1448 * ATW_GPIO_EN_MASK = 1, ATW_GPIO_O_MASK = 1. I had speculated 1449 * that this enables the Si4126 by raising its PWDN#, but I 1450 * think that it actually sets the Prism RF front-end 1451 * to a special mode for channel 14. 1452 */ 1453 reg = ATW_READ(sc, ATW_GPIO); 1454 reg &= ~(ATW_GPIO_EN_MASK|ATW_GPIO_O_MASK|ATW_GPIO_I_MASK); 1455 reg |= LSHIFT(1, ATW_GPIO_EN_MASK) | LSHIFT(1, ATW_GPIO_O_MASK); 1456 ATW_WRITE(sc, ATW_GPIO, reg); 1457 } 1458 1459 #ifdef ATW_DEBUG 1460 atw_si4126_print(sc); 1461 #endif /* ATW_DEBUG */ 1462 1463 out: 1464 atw_rfio_enable(sc, 0); 1465 1466 return rc; 1467 } 1468 1469 /* Baseline initialization of RF3000 BBP: set CCA mode and enable antenna 1470 * diversity. 1471 * 1472 * Call this w/ Tx/Rx suspended. 1473 */ 1474 static int 1475 atw_rf3000_init(struct atw_softc *sc) 1476 { 1477 int rc = 0; 1478 1479 atw_idle(sc, ATW_NAR_SR|ATW_NAR_ST); 1480 1481 atw_rfio_enable(sc, 1); 1482 1483 /* enable diversity */ 1484 rc = atw_rf3000_write(sc, RF3000_DIVCTL, RF3000_DIVCTL_ENABLE); 1485 1486 if (rc != 0) 1487 goto out; 1488 1489 /* sensible setting from a binary-only driver */ 1490 rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1491 LSHIFT(0x1d, RF3000_GAINCTL_TXVGC_MASK)); 1492 1493 if (rc != 0) 1494 goto out; 1495 1496 /* magic from a binary-only driver */ 1497 rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, 1498 LSHIFT(0x38, RF3000_LOGAINCAL_CAL_MASK)); 1499 1500 if (rc != 0) 1501 goto out; 1502 1503 rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, RF3000_HIGAINCAL_DSSSPAD); 1504 1505 if (rc != 0) 1506 goto out; 1507 1508 rc = atw_rf3000_write(sc, RF3000_OPTIONS1, 0x0); 1509 1510 if (rc != 0) 1511 goto out; 1512 1513 rc = atw_rf3000_write(sc, RF3000_OPTIONS2, RF3000_OPTIONS2_LNAGS_DELAY); 1514 1515 if (rc != 0) 1516 goto out; 1517 1518 /* CCA is acquisition sensitive */ 1519 rc = atw_rf3000_write(sc, RF3000_CCACTL, 1520 LSHIFT(RF3000_CCACTL_MODE_ACQ, RF3000_CCACTL_MODE_MASK)); 1521 1522 if (rc != 0) 1523 goto out; 1524 1525 out: 1526 atw_rfio_enable(sc, 0); 1527 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1528 return rc; 1529 } 1530 1531 #ifdef ATW_DEBUG 1532 static void 1533 atw_rf3000_print(struct atw_softc *sc) 1534 { 1535 struct ifnet *ifp = &sc->sc_ic.ic_if; 1536 u_int addr, val; 1537 1538 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1539 return; 1540 1541 for (addr = 0x01; addr <= 0x15; addr++) { 1542 printf("%s: bbp[%d] = \n", sc->sc_dev.dv_xname, addr); 1543 if (atw_rf3000_read(sc, addr, &val) != 0) { 1544 printf("<unknown> (quitting print-out)\n"); 1545 break; 1546 } 1547 printf("%08x\n", val); 1548 } 1549 } 1550 #endif /* ATW_DEBUG */ 1551 1552 /* Set the power settings on the BBP for channel `chan'. */ 1553 static int 1554 atw_rf3000_tune(struct atw_softc *sc, u_int8_t chan) 1555 { 1556 int rc = 0; 1557 u_int32_t reg; 1558 u_int16_t txpower, lpf_cutoff, lna_gs_thresh; 1559 1560 txpower = sc->sc_srom[ATW_SR_TXPOWER(chan)]; 1561 lpf_cutoff = sc->sc_srom[ATW_SR_LPF_CUTOFF(chan)]; 1562 lna_gs_thresh = sc->sc_srom[ATW_SR_LNA_GS_THRESH(chan)]; 1563 1564 /* odd channels: LSB, even channels: MSB */ 1565 if (chan % 2 == 1) { 1566 txpower &= 0xFF; 1567 lpf_cutoff &= 0xFF; 1568 lna_gs_thresh &= 0xFF; 1569 } else { 1570 txpower >>= 8; 1571 lpf_cutoff >>= 8; 1572 lna_gs_thresh >>= 8; 1573 } 1574 1575 #ifdef ATW_DEBUG 1576 atw_rf3000_print(sc); 1577 #endif /* ATW_DEBUG */ 1578 1579 DPRINTF(sc, ("%s: chan %d txpower %02x, lpf_cutoff %02x, " 1580 "lna_gs_thresh %02x\n", 1581 sc->sc_dev.dv_xname, chan, txpower, lpf_cutoff, lna_gs_thresh)); 1582 1583 atw_rfio_enable(sc, 1); 1584 1585 if ((rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1586 LSHIFT(txpower, RF3000_GAINCTL_TXVGC_MASK))) != 0) 1587 goto out; 1588 1589 if ((rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, lpf_cutoff)) != 0) 1590 goto out; 1591 1592 if ((rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, lna_gs_thresh)) != 0) 1593 goto out; 1594 1595 /* from a binary-only driver. */ 1596 reg = ATW_READ(sc, ATW_PLCPHD); 1597 reg &= ~ATW_PLCPHD_SERVICE_MASK; 1598 reg |= LSHIFT(txpower << 2, ATW_PLCPHD_SERVICE_MASK); 1599 ATW_WRITE(sc, ATW_PLCPHD, reg); 1600 1601 #ifdef ATW_DEBUG 1602 atw_rf3000_print(sc); 1603 #endif /* ATW_DEBUG */ 1604 1605 out: 1606 atw_rfio_enable(sc, 0); 1607 1608 return rc; 1609 } 1610 1611 /* Write a register on the RF3000 baseband processor using the 1612 * registers provided by the ADM8211 for this purpose. 1613 * 1614 * Return 0 on success. 1615 */ 1616 static int 1617 atw_rf3000_write(struct atw_softc *sc, u_int addr, u_int val) 1618 { 1619 u_int32_t reg; 1620 int i; 1621 1622 for (i = 1000; --i >= 0; ) { 1623 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD|ATW_BBPCTL_WR) == 0) 1624 break; 1625 DELAY(100); 1626 } 1627 1628 if (i < 0) { 1629 printf("%s: BBPCTL busy (pre-write)\n", sc->sc_dev.dv_xname); 1630 return ETIMEDOUT; 1631 } 1632 1633 reg = sc->sc_bbpctl_wr | 1634 LSHIFT(val & 0xff, ATW_BBPCTL_DATA_MASK) | 1635 LSHIFT(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1636 1637 ATW_WRITE(sc, ATW_BBPCTL, reg); 1638 1639 for (i = 1000; --i >= 0; ) { 1640 DELAY(100); 1641 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_WR) == 0) 1642 break; 1643 } 1644 1645 ATW_CLR(sc, ATW_BBPCTL, ATW_BBPCTL_WR); 1646 1647 if (i < 0) { 1648 printf("%s: BBPCTL busy (post-write)\n", sc->sc_dev.dv_xname); 1649 return ETIMEDOUT; 1650 } 1651 return 0; 1652 } 1653 1654 /* Read a register on the RF3000 baseband processor using the registers 1655 * the ADM8211 provides for this purpose. 1656 * 1657 * The 7-bit register address is addr. Record the 8-bit data in the register 1658 * in *val. 1659 * 1660 * Return 0 on success. 1661 * 1662 * XXX This does not seem to work. The ADM8211 must require more or 1663 * different magic to read the chip than to write it. Possibly some 1664 * of the magic I have derived from a binary-only driver concerns 1665 * the "chip address" (see the RF3000 manual). 1666 */ 1667 #ifdef ATW_DEBUG 1668 static int 1669 atw_rf3000_read(struct atw_softc *sc, u_int addr, u_int *val) 1670 { 1671 u_int32_t reg; 1672 int i; 1673 1674 for (i = 1000; --i >= 0; ) { 1675 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD|ATW_BBPCTL_WR) == 0) 1676 break; 1677 DELAY(100); 1678 } 1679 1680 if (i < 0) { 1681 printf("%s: start atw_rf3000_read, BBPCTL busy\n", 1682 sc->sc_dev.dv_xname); 1683 return ETIMEDOUT; 1684 } 1685 1686 reg = sc->sc_bbpctl_rd | LSHIFT(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1687 1688 ATW_WRITE(sc, ATW_BBPCTL, reg); 1689 1690 for (i = 1000; --i >= 0; ) { 1691 DELAY(100); 1692 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD) == 0) 1693 break; 1694 } 1695 1696 ATW_CLR(sc, ATW_BBPCTL, ATW_BBPCTL_RD); 1697 1698 if (i < 0) { 1699 printf("%s: atw_rf3000_read wrote %08x; BBPCTL still busy\n", 1700 sc->sc_dev.dv_xname, reg); 1701 return ETIMEDOUT; 1702 } 1703 if (val != NULL) 1704 *val = MASK_AND_RSHIFT(reg, ATW_BBPCTL_DATA_MASK); 1705 return 0; 1706 } 1707 #endif /* ATW_DEBUG */ 1708 1709 /* Write a register on the Si4126 RF/IF synthesizer using the registers 1710 * provided by the ADM8211 for that purpose. 1711 * 1712 * val is 18 bits of data, and val is the 4-bit address of the register. 1713 * 1714 * Return 0 on success. 1715 */ 1716 static int 1717 atw_si4126_write(struct atw_softc *sc, u_int addr, u_int val) 1718 { 1719 u_int32_t bits, reg; 1720 int i; 1721 1722 KASSERT((addr & ~PRESHIFT(SI4126_TWI_ADDR_MASK)) == 0); 1723 KASSERT((val & ~PRESHIFT(SI4126_TWI_DATA_MASK)) == 0); 1724 1725 for (i = 1000; --i >= 0; ) { 1726 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0) 1727 break; 1728 DELAY(100); 1729 } 1730 1731 if (i < 0) { 1732 printf("%s: start atw_si4126_write, SYNCTL busy\n", 1733 sc->sc_dev.dv_xname); 1734 return ETIMEDOUT; 1735 } 1736 1737 bits = LSHIFT(val, SI4126_TWI_DATA_MASK) | 1738 LSHIFT(addr, SI4126_TWI_ADDR_MASK); 1739 1740 reg = sc->sc_synctl_wr | LSHIFT(bits, ATW_SYNCTL_DATA_MASK); 1741 1742 ATW_WRITE(sc, ATW_SYNCTL, reg); 1743 1744 for (i = 1000; --i >= 0; ) { 1745 DELAY(100); 1746 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_WR) == 0) 1747 break; 1748 } 1749 1750 /* restore to acceptable starting condition */ 1751 ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_WR); 1752 1753 if (i < 0) { 1754 printf("%s: atw_si4126_write wrote %08x, SYNCTL still busy\n", 1755 sc->sc_dev.dv_xname, reg); 1756 return ETIMEDOUT; 1757 } 1758 return 0; 1759 } 1760 1761 /* Read 18-bit data from the 4-bit address addr in Si4126 1762 * RF synthesizer and write the data to *val. Return 0 on success. 1763 * 1764 * XXX This does not seem to work. The ADM8211 must require more or 1765 * different magic to read the chip than to write it. 1766 */ 1767 #ifdef ATW_DEBUG 1768 static int 1769 atw_si4126_read(struct atw_softc *sc, u_int addr, u_int *val) 1770 { 1771 u_int32_t reg; 1772 int i; 1773 1774 KASSERT((addr & ~PRESHIFT(SI4126_TWI_ADDR_MASK)) == 0); 1775 1776 for (i = 1000; --i >= 0; ) { 1777 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0) 1778 break; 1779 DELAY(100); 1780 } 1781 1782 if (i < 0) { 1783 printf("%s: start atw_si4126_read, SYNCTL busy\n", 1784 sc->sc_dev.dv_xname); 1785 return ETIMEDOUT; 1786 } 1787 1788 reg = sc->sc_synctl_rd | LSHIFT(addr, ATW_SYNCTL_DATA_MASK); 1789 1790 ATW_WRITE(sc, ATW_SYNCTL, reg); 1791 1792 for (i = 1000; --i >= 0; ) { 1793 DELAY(100); 1794 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD) == 0) 1795 break; 1796 } 1797 1798 ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_RD); 1799 1800 if (i < 0) { 1801 printf("%s: atw_si4126_read wrote %08x, SYNCTL still busy\n", 1802 sc->sc_dev.dv_xname, reg); 1803 return ETIMEDOUT; 1804 } 1805 if (val != NULL) 1806 *val = MASK_AND_RSHIFT(ATW_READ(sc, ATW_SYNCTL), 1807 ATW_SYNCTL_DATA_MASK); 1808 return 0; 1809 } 1810 #endif /* ATW_DEBUG */ 1811 1812 /* XXX is the endianness correct? test. */ 1813 #define atw_calchash(addr) \ 1814 (ether_crc32_le((addr), IEEE80211_ADDR_LEN) & BITS(5, 0)) 1815 1816 /* 1817 * atw_filter_setup: 1818 * 1819 * Set the ADM8211's receive filter. 1820 */ 1821 static void 1822 atw_filter_setup(struct atw_softc *sc) 1823 { 1824 struct ieee80211com *ic = &sc->sc_ic; 1825 struct ethercom *ec = &ic->ic_ec; 1826 struct ifnet *ifp = &sc->sc_ic.ic_if; 1827 int hash; 1828 u_int32_t hashes[2] = { 0, 0 }; 1829 struct ether_multi *enm; 1830 struct ether_multistep step; 1831 1832 DPRINTF(sc, ("%s: atw_filter_setup: sc_flags 0x%08x\n", 1833 sc->sc_dev.dv_xname, sc->sc_flags)); 1834 1835 /* 1836 * If we're running, idle the receive engine. If we're NOT running, 1837 * we're being called from atw_init(), and our writing ATW_NAR will 1838 * start the transmit and receive processes in motion. 1839 */ 1840 if (ifp->if_flags & IFF_RUNNING) 1841 atw_idle(sc, ATW_NAR_SR); 1842 1843 sc->sc_opmode &= ~(ATW_NAR_PR|ATW_NAR_MM); 1844 1845 ifp->if_flags &= ~IFF_ALLMULTI; 1846 1847 if (ifp->if_flags & IFF_PROMISC) { 1848 sc->sc_opmode |= ATW_NAR_PR; 1849 allmulti: 1850 ifp->if_flags |= IFF_ALLMULTI; 1851 goto setit; 1852 } 1853 1854 /* 1855 * Program the 64-bit multicast hash filter. 1856 */ 1857 ETHER_FIRST_MULTI(step, ec, enm); 1858 while (enm != NULL) { 1859 /* XXX */ 1860 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 1861 ETHER_ADDR_LEN) != 0) 1862 goto allmulti; 1863 1864 hash = atw_calchash(enm->enm_addrlo); 1865 hashes[hash >> 5] |= 1 << (hash & 0x1f); 1866 ETHER_NEXT_MULTI(step, enm); 1867 } 1868 1869 if (ifp->if_flags & IFF_BROADCAST) { 1870 hash = atw_calchash(etherbroadcastaddr); 1871 hashes[hash >> 5] |= 1 << (hash & 0x1f); 1872 } 1873 1874 /* all bits set => hash is useless */ 1875 if (~(hashes[0] & hashes[1]) == 0) 1876 goto allmulti; 1877 1878 setit: 1879 if (ifp->if_flags & IFF_ALLMULTI) 1880 sc->sc_opmode |= ATW_NAR_MM; 1881 1882 /* XXX in scan mode, do not filter packets. maybe this is 1883 * unnecessary. 1884 */ 1885 if (ic->ic_state == IEEE80211_S_SCAN) 1886 sc->sc_opmode |= ATW_NAR_PR; 1887 1888 ATW_WRITE(sc, ATW_MAR0, hashes[0]); 1889 ATW_WRITE(sc, ATW_MAR1, hashes[1]); 1890 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1891 DPRINTF(sc, ("%s: ATW_NAR %08x opmode %08x\n", sc->sc_dev.dv_xname, 1892 ATW_READ(sc, ATW_NAR), sc->sc_opmode)); 1893 1894 DPRINTF(sc, ("%s: atw_filter_setup: returning\n", sc->sc_dev.dv_xname)); 1895 } 1896 1897 /* Tell the ADM8211 our preferred BSSID. The ADM8211 must match 1898 * a beacon's BSSID and SSID against the preferred BSSID and SSID 1899 * before it will raise ATW_INTR_LINKON. When the ADM8211 receives 1900 * no beacon with the preferred BSSID and SSID in the number of 1901 * beacon intervals given in ATW_BPLI, then it raises ATW_INTR_LINKOFF. 1902 */ 1903 static void 1904 atw_write_bssid(struct atw_softc *sc) 1905 { 1906 struct ieee80211com *ic = &sc->sc_ic; 1907 u_int8_t *bssid; 1908 1909 bssid = ic->ic_bss->ni_bssid; 1910 1911 ATW_WRITE(sc, ATW_ABDA1, 1912 (ATW_READ(sc, ATW_ABDA1) & 1913 ~(ATW_ABDA1_BSSIDB4_MASK|ATW_ABDA1_BSSIDB5_MASK)) | 1914 LSHIFT(bssid[4], ATW_ABDA1_BSSIDB4_MASK) | 1915 LSHIFT(bssid[5], ATW_ABDA1_BSSIDB5_MASK)); 1916 1917 ATW_WRITE(sc, ATW_BSSID0, 1918 LSHIFT(bssid[0], ATW_BSSID0_BSSIDB0_MASK) | 1919 LSHIFT(bssid[1], ATW_BSSID0_BSSIDB1_MASK) | 1920 LSHIFT(bssid[2], ATW_BSSID0_BSSIDB2_MASK) | 1921 LSHIFT(bssid[3], ATW_BSSID0_BSSIDB3_MASK)); 1922 1923 DPRINTF(sc, ("%s: BSSID %s -> ", sc->sc_dev.dv_xname, 1924 ether_sprintf(sc->sc_bssid))); 1925 DPRINTF(sc, ("%s\n", ether_sprintf(bssid))); 1926 1927 memcpy(sc->sc_bssid, bssid, sizeof(sc->sc_bssid)); 1928 } 1929 1930 /* Tell the ADM8211 how many beacon intervals must pass without 1931 * receiving a beacon with the preferred BSSID & SSID set by 1932 * atw_write_bssid and atw_write_ssid before ATW_INTR_LINKOFF 1933 * raised. 1934 */ 1935 static void 1936 atw_write_bcn_thresh(struct atw_softc *sc) 1937 { 1938 struct ieee80211com *ic = &sc->sc_ic; 1939 int lost_bcn_thresh; 1940 1941 /* Lose link after one second or 7 beacons, whichever comes 1942 * first, but do not lose link before 2 beacons are lost. 1943 * 1944 * In host AP mode, set the lost-beacon threshold to 0. 1945 */ 1946 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 1947 lost_bcn_thresh = 0; 1948 else { 1949 int beacons_per_second = 1950 1000000 / (IEEE80211_DUR_TU * MAX(1,ic->ic_bss->ni_intval)); 1951 lost_bcn_thresh = MAX(2, MIN(7, beacons_per_second)); 1952 } 1953 1954 /* XXX resets wake-up status bits */ 1955 ATW_WRITE(sc, ATW_WCSR, 1956 (ATW_READ(sc, ATW_WCSR) & ~ATW_WCSR_BLN_MASK) | 1957 (LSHIFT(lost_bcn_thresh, ATW_WCSR_BLN_MASK) & ATW_WCSR_BLN_MASK)); 1958 1959 DPRINTF(sc, ("%s: lost-beacon threshold %d -> %d\n", 1960 sc->sc_dev.dv_xname, sc->sc_lost_bcn_thresh, lost_bcn_thresh)); 1961 1962 sc->sc_lost_bcn_thresh = lost_bcn_thresh; 1963 1964 DPRINTF(sc, ("%s: atw_write_bcn_thresh reg[WCSR] = %08x\n", 1965 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_WCSR))); 1966 } 1967 1968 /* Write buflen bytes from buf to SRAM starting at the SRAM's ofs'th 1969 * 16-bit word. 1970 */ 1971 static void 1972 atw_write_sram(struct atw_softc *sc, u_int ofs, u_int8_t *buf, u_int buflen) 1973 { 1974 u_int i; 1975 u_int8_t *ptr; 1976 1977 memcpy(&sc->sc_sram[ofs], buf, buflen); 1978 1979 if (ofs % 2 != 0) { 1980 ofs--; 1981 buflen++; 1982 } 1983 1984 if (buflen % 2 != 0) 1985 buflen++; 1986 1987 assert(buflen + ofs <= ATW_SRAM_SIZE); 1988 1989 ptr = &sc->sc_sram[ofs]; 1990 1991 for (i = 0; i < buflen; i += 2) { 1992 ATW_WRITE(sc, ATW_WEPCTL, ATW_WEPCTL_WR | 1993 LSHIFT((ofs + i) / 2, ATW_WEPCTL_TBLADD_MASK)); 1994 DELAY(atw_writewep_delay); 1995 1996 ATW_WRITE(sc, ATW_WESK, 1997 LSHIFT((ptr[i + 1] << 8) | ptr[i], ATW_WESK_DATA_MASK)); 1998 DELAY(atw_writewep_delay); 1999 } 2000 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); /* restore WEP condition */ 2001 2002 if (sc->sc_if.if_flags & IFF_DEBUG) { 2003 int n_octets = 0; 2004 printf("%s: wrote %d bytes at 0x%x wepctl 0x%08x\n", 2005 sc->sc_dev.dv_xname, buflen, ofs, sc->sc_wepctl); 2006 for (i = 0; i < buflen; i++) { 2007 printf(" %02x", ptr[i]); 2008 if (++n_octets % 24 == 0) 2009 printf("\n"); 2010 } 2011 if (n_octets % 24 != 0) 2012 printf("\n"); 2013 } 2014 } 2015 2016 /* Write WEP keys from the ieee80211com to the ADM8211's SRAM. */ 2017 static void 2018 atw_write_wep(struct atw_softc *sc) 2019 { 2020 struct ieee80211com *ic = &sc->sc_ic; 2021 /* SRAM shared-key record format: key0 flags key1 ... key12 */ 2022 u_int8_t buf[IEEE80211_WEP_NKID] 2023 [1 /* key[0] */ + 1 /* flags */ + 12 /* key[1 .. 12] */]; 2024 u_int32_t reg; 2025 int i; 2026 2027 sc->sc_wepctl = 0; 2028 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); 2029 2030 if ((ic->ic_flags & IEEE80211_F_WEPON) == 0) 2031 return; 2032 2033 memset(&buf[0][0], 0, sizeof(buf)); 2034 2035 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 2036 if (ic->ic_nw_keys[i].wk_len > 5) { 2037 buf[i][1] = ATW_WEP_ENABLED | ATW_WEP_104BIT; 2038 } else if (ic->ic_nw_keys[i].wk_len != 0) { 2039 buf[i][1] = ATW_WEP_ENABLED; 2040 } else { 2041 buf[i][1] = 0; 2042 continue; 2043 } 2044 buf[i][0] = ic->ic_nw_keys[i].wk_key[0]; 2045 memcpy(&buf[i][2], &ic->ic_nw_keys[i].wk_key[1], 2046 ic->ic_nw_keys[i].wk_len - 1); 2047 } 2048 2049 reg = ATW_READ(sc, ATW_MACTEST); 2050 reg |= ATW_MACTEST_MMI_USETXCLK | ATW_MACTEST_FORCE_KEYID; 2051 reg &= ~ATW_MACTEST_KEYID_MASK; 2052 reg |= LSHIFT(ic->ic_wep_txkey, ATW_MACTEST_KEYID_MASK); 2053 ATW_WRITE(sc, ATW_MACTEST, reg); 2054 2055 /* RX bypass WEP if revision != 0x20. (I assume revision != 0x20 2056 * throughout.) 2057 */ 2058 sc->sc_wepctl = ATW_WEPCTL_WEPENABLE | ATW_WEPCTL_WEPRXBYP; 2059 if (sc->sc_if.if_flags & IFF_LINK2) 2060 sc->sc_wepctl &= ~ATW_WEPCTL_WEPRXBYP; 2061 2062 atw_write_sram(sc, ATW_SRAM_ADDR_SHARED_KEY, (u_int8_t*)&buf[0][0], 2063 sizeof(buf)); 2064 } 2065 2066 const struct timeval atw_beacon_mininterval = {1, 0}; /* 1s */ 2067 2068 static void 2069 atw_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 2070 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2071 { 2072 struct atw_softc *sc = (struct atw_softc*)ic->ic_softc; 2073 2074 switch (subtype) { 2075 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2076 /* do nothing: hardware answers probe request */ 2077 break; 2078 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 2079 case IEEE80211_FC0_SUBTYPE_BEACON: 2080 atw_recv_beacon(ic, m, ni, subtype, rssi, rstamp); 2081 break; 2082 default: 2083 (*sc->sc_recv_mgmt)(ic, m, ni, subtype, rssi, rstamp); 2084 break; 2085 } 2086 return; 2087 } 2088 2089 /* In ad hoc mode, atw_recv_beacon is responsible for the coalescence 2090 * of IBSSs with like SSID/channel but different BSSID. It joins the 2091 * oldest IBSS (i.e., with greatest TSF time), since that is the WECA 2092 * convention. Possibly the ADMtek chip does this for us; I will have 2093 * to test to find out. 2094 * 2095 * XXX we should add the duration field of the received beacon to 2096 * the TSF time it contains before comparing it with the ADM8211's 2097 * TSF. 2098 */ 2099 static void 2100 atw_recv_beacon(struct ieee80211com *ic, struct mbuf *m0, 2101 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2102 { 2103 struct atw_softc *sc; 2104 struct ieee80211_frame *wh; 2105 u_int64_t tsft, bcn_tsft; 2106 u_int32_t tsftl, tsfth; 2107 int do_print = 0; 2108 2109 sc = (struct atw_softc*)ic->ic_if.if_softc; 2110 2111 if (ic->ic_if.if_flags & IFF_DEBUG) 2112 do_print = (ic->ic_if.if_flags & IFF_LINK0) 2113 ? 1 : ratecheck(&sc->sc_last_beacon, &atw_beacon_mininterval); 2114 2115 wh = mtod(m0, struct ieee80211_frame *); 2116 2117 (*sc->sc_recv_mgmt)(ic, m0, ni, subtype, rssi, rstamp); 2118 2119 if (ic->ic_state != IEEE80211_S_RUN) { 2120 if (do_print) 2121 printf("%s: atw_recv_beacon: not running\n", 2122 sc->sc_dev.dv_xname); 2123 return; 2124 } 2125 2126 if ((ni = ieee80211_lookup_node(ic, wh->i_addr2, 2127 ic->ic_bss->ni_chan)) == NULL) { 2128 if (do_print) 2129 printf("%s: atw_recv_beacon: no node %s\n", 2130 sc->sc_dev.dv_xname, ether_sprintf(wh->i_addr2)); 2131 return; 2132 } 2133 2134 if (ieee80211_match_bss(ic, ni) != 0) { 2135 if (do_print) 2136 printf("%s: atw_recv_beacon: ssid mismatch %s\n", 2137 sc->sc_dev.dv_xname, ether_sprintf(wh->i_addr2)); 2138 return; 2139 } 2140 2141 if (memcmp(ni->ni_bssid, ic->ic_bss->ni_bssid, IEEE80211_ADDR_LEN) == 0) 2142 return; 2143 2144 if (do_print) 2145 printf("%s: atw_recv_beacon: bssid mismatch %s\n", 2146 sc->sc_dev.dv_xname, ether_sprintf(ni->ni_bssid)); 2147 2148 if (ic->ic_opmode != IEEE80211_M_IBSS) 2149 return; 2150 2151 /* If we read TSFTL right before rollover, we read a TSF timer 2152 * that is too high rather than too low. This prevents a spurious 2153 * synchronization down the line, however, our IBSS could suffer 2154 * from a creeping TSF.... 2155 */ 2156 tsftl = ATW_READ(sc, ATW_TSFTL); 2157 tsfth = ATW_READ(sc, ATW_TSFTH); 2158 2159 tsft = (u_int64_t)tsfth << 32 | tsftl; 2160 bcn_tsft = le64toh(*(u_int64_t*)ni->ni_tstamp); 2161 2162 if (do_print) 2163 printf("%s: my tsft %" PRIu64 " beacon tsft %" PRIu64 "\n", 2164 sc->sc_dev.dv_xname, tsft, bcn_tsft); 2165 2166 /* we are faster, let the other guy catch up */ 2167 if (bcn_tsft < tsft) 2168 return; 2169 2170 if (do_print) 2171 printf("%s: sync TSF with %s\n", sc->sc_dev.dv_xname, 2172 ether_sprintf(wh->i_addr2)); 2173 2174 ic->ic_flags &= ~IEEE80211_F_SIBSS; 2175 2176 #if 0 2177 atw_tsf(sc); 2178 #endif 2179 2180 /* negotiate rates with new IBSS */ 2181 ieee80211_fix_rate(ic, ni, IEEE80211_F_DOFRATE | 2182 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2183 if (ni->ni_rates.rs_nrates == 0) { 2184 printf("%s: rates mismatch, BSSID %s\n", sc->sc_dev.dv_xname, 2185 ether_sprintf(ni->ni_bssid)); 2186 return; 2187 } 2188 2189 if (do_print) { 2190 printf("%s: sync BSSID %s -> ", sc->sc_dev.dv_xname, 2191 ether_sprintf(ic->ic_bss->ni_bssid)); 2192 printf("%s ", ether_sprintf(ni->ni_bssid)); 2193 printf("(from %s)\n", ether_sprintf(wh->i_addr2)); 2194 } 2195 2196 (*ic->ic_node_copy)(ic, ic->ic_bss, ni); 2197 2198 atw_write_bssid(sc); 2199 atw_write_bcn_thresh(sc); 2200 atw_start_beacon(sc, 1); 2201 } 2202 2203 /* Write the SSID in the ieee80211com to the SRAM on the ADM8211. 2204 * In ad hoc mode, the SSID is written to the beacons sent by the 2205 * ADM8211. In both ad hoc and infrastructure mode, beacons received 2206 * with matching SSID affect ATW_INTR_LINKON/ATW_INTR_LINKOFF 2207 * indications. 2208 */ 2209 static void 2210 atw_write_ssid(struct atw_softc *sc) 2211 { 2212 struct ieee80211com *ic = &sc->sc_ic; 2213 /* 34 bytes are reserved in ADM8211 SRAM for the SSID */ 2214 u_int8_t buf[roundup(1 /* length */ + IEEE80211_NWID_LEN, 2)]; 2215 2216 memset(buf, 0, sizeof(buf)); 2217 buf[0] = ic->ic_bss->ni_esslen; 2218 memcpy(&buf[1], ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen); 2219 2220 atw_write_sram(sc, ATW_SRAM_ADDR_SSID, buf, sizeof(buf)); 2221 } 2222 2223 /* Write the supported rates in the ieee80211com to the SRAM of the ADM8211. 2224 * In ad hoc mode, the supported rates are written to beacons sent by the 2225 * ADM8211. 2226 */ 2227 static void 2228 atw_write_sup_rates(struct atw_softc *sc) 2229 { 2230 struct ieee80211com *ic = &sc->sc_ic; 2231 /* 14 bytes are probably (XXX) reserved in the ADM8211 SRAM for 2232 * supported rates 2233 */ 2234 u_int8_t buf[roundup(1 /* length */ + IEEE80211_RATE_SIZE, 2)]; 2235 2236 memset(buf, 0, sizeof(buf)); 2237 2238 buf[0] = ic->ic_bss->ni_rates.rs_nrates; 2239 2240 memcpy(&buf[1], ic->ic_bss->ni_rates.rs_rates, 2241 ic->ic_bss->ni_rates.rs_nrates); 2242 2243 atw_write_sram(sc, ATW_SRAM_ADDR_SUPRATES, buf, sizeof(buf)); 2244 } 2245 2246 /* Start/stop sending beacons. */ 2247 void 2248 atw_start_beacon(struct atw_softc *sc, int start) 2249 { 2250 struct ieee80211com *ic = &sc->sc_ic; 2251 u_int32_t len, capinfo, reg_bcnt, reg_cap1; 2252 2253 if (ATW_IS_ENABLED(sc) == 0) 2254 return; 2255 2256 len = capinfo = 0; 2257 2258 /* start beacons */ 2259 len = sizeof(struct ieee80211_frame) + 2260 8 /* timestamp */ + 2 /* beacon interval */ + 2261 2 /* capability info */ + 2262 2 + ic->ic_bss->ni_esslen /* SSID element */ + 2263 2 + ic->ic_bss->ni_rates.rs_nrates /* rates element */ + 2264 3 /* DS parameters */ + 2265 IEEE80211_CRC_LEN; 2266 2267 reg_bcnt = ATW_READ(sc, ATW_BCNT) & ~ATW_BCNT_BCNT_MASK; 2268 2269 reg_cap1 = ATW_READ(sc, ATW_CAP1) & ~ATW_CAP1_CAPI_MASK; 2270 2271 ATW_WRITE(sc, ATW_BCNT, reg_bcnt); 2272 ATW_WRITE(sc, ATW_CAP1, reg_cap1); 2273 2274 if (!start) 2275 return; 2276 2277 /* TBD use ni_capinfo */ 2278 2279 if (sc->sc_flags & ATWF_SHORT_PREAMBLE) 2280 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2281 if (ic->ic_flags & IEEE80211_F_WEPON) 2282 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2283 2284 switch (ic->ic_opmode) { 2285 case IEEE80211_M_IBSS: 2286 len += 4; /* IBSS parameters */ 2287 capinfo |= IEEE80211_CAPINFO_IBSS; 2288 break; 2289 case IEEE80211_M_HOSTAP: 2290 /* XXX 6-byte minimum TIM */ 2291 len += atw_beacon_len_adjust; 2292 capinfo |= IEEE80211_CAPINFO_ESS; 2293 break; 2294 default: 2295 return; 2296 } 2297 2298 reg_bcnt |= LSHIFT(len, ATW_BCNT_BCNT_MASK); 2299 reg_cap1 |= LSHIFT(capinfo, ATW_CAP1_CAPI_MASK); 2300 2301 ATW_WRITE(sc, ATW_BCNT, reg_bcnt); 2302 ATW_WRITE(sc, ATW_CAP1, reg_cap1); 2303 2304 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_BCNT] = %08x\n", 2305 sc->sc_dev.dv_xname, reg_bcnt)); 2306 2307 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_CAP1] = %08x\n", 2308 sc->sc_dev.dv_xname, reg_cap1)); 2309 } 2310 2311 /* First beacon was sent at time 0 microseconds, current time is 2312 * tsfth << 32 | tsftl microseconds, and beacon interval is tbtt 2313 * microseconds. Return the expected time in microseconds for the 2314 * beacon after next. 2315 */ 2316 static __inline u_int64_t 2317 atw_predict_beacon(u_int64_t tsft, u_int32_t tbtt) 2318 { 2319 return tsft + (tbtt - tsft % tbtt); 2320 } 2321 2322 /* If we've created an IBSS, write the TSF time in the ADM8211 to 2323 * the ieee80211com. 2324 * 2325 * Predict the next target beacon transmission time (TBTT) and 2326 * write it to the ADM8211. 2327 */ 2328 static void 2329 atw_tsf(struct atw_softc *sc) 2330 { 2331 #define TBTTOFS 20 /* TU */ 2332 2333 struct ieee80211com *ic = &sc->sc_ic; 2334 u_int64_t tsft, tbtt; 2335 2336 if ((ic->ic_opmode == IEEE80211_M_HOSTAP) || 2337 ((ic->ic_opmode == IEEE80211_M_IBSS) && 2338 (ic->ic_flags & IEEE80211_F_SIBSS))) { 2339 tsft = ATW_READ(sc, ATW_TSFTH); 2340 tsft <<= 32; 2341 tsft |= ATW_READ(sc, ATW_TSFTL); 2342 *(u_int64_t*)&ic->ic_bss->ni_tstamp[0] = htole64(tsft); 2343 } else 2344 tsft = le64toh(*(u_int64_t*)&ic->ic_bss->ni_tstamp[0]); 2345 2346 tbtt = atw_predict_beacon(tsft, 2347 ic->ic_bss->ni_intval * IEEE80211_DUR_TU); 2348 2349 /* skip one more beacon so that the TBTT cannot pass before 2350 * we've programmed it, and also so that we can subtract a 2351 * few TU so that we wake a little before TBTT. 2352 */ 2353 tbtt += ic->ic_bss->ni_intval * IEEE80211_DUR_TU; 2354 2355 /* wake up a little early */ 2356 tbtt -= TBTTOFS * IEEE80211_DUR_TU; 2357 2358 DPRINTF(sc, ("%s: tsft %" PRIu64 " tbtt %" PRIu64 "\n", 2359 sc->sc_dev.dv_xname, tsft, tbtt)); 2360 2361 ATW_WRITE(sc, ATW_TOFS1, 2362 LSHIFT(1, ATW_TOFS1_TSFTOFSR_MASK) | 2363 LSHIFT(TBTTOFS, ATW_TOFS1_TBTTOFS_MASK) | 2364 LSHIFT( 2365 MASK_AND_RSHIFT((u_int32_t)tbtt, BITS(25, 10)), 2366 ATW_TOFS1_TBTTPRE_MASK)); 2367 #undef TBTTOFS 2368 } 2369 2370 static void 2371 atw_next_scan(void *arg) 2372 { 2373 struct atw_softc *sc = arg; 2374 struct ieee80211com *ic = &sc->sc_ic; 2375 struct ifnet *ifp = &ic->ic_if; 2376 int s; 2377 2378 /* don't call atw_start w/o network interrupts blocked */ 2379 s = splnet(); 2380 if (ic->ic_state == IEEE80211_S_SCAN) 2381 ieee80211_next_scan(ifp); 2382 splx(s); 2383 } 2384 2385 /* Synchronize the hardware state with the software state. */ 2386 static int 2387 atw_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 2388 { 2389 struct ifnet *ifp = &ic->ic_if; 2390 struct atw_softc *sc = ifp->if_softc; 2391 enum ieee80211_state ostate; 2392 int error; 2393 2394 ostate = ic->ic_state; 2395 2396 if (nstate == IEEE80211_S_INIT) { 2397 callout_stop(&sc->sc_scan_ch); 2398 sc->sc_cur_chan = IEEE80211_CHAN_ANY; 2399 atw_start_beacon(sc, 0); 2400 return (*sc->sc_newstate)(ic, nstate, arg); 2401 } 2402 2403 if ((error = atw_tune(sc)) != 0) 2404 return error; 2405 2406 switch (nstate) { 2407 case IEEE80211_S_ASSOC: 2408 break; 2409 case IEEE80211_S_INIT: 2410 panic("%s: unexpected state IEEE80211_S_INIT\n", __func__); 2411 break; 2412 case IEEE80211_S_SCAN: 2413 memset(sc->sc_bssid, 0, IEEE80211_ADDR_LEN); 2414 atw_write_bssid(sc); 2415 2416 callout_reset(&sc->sc_scan_ch, atw_dwelltime * hz / 1000, 2417 atw_next_scan, sc); 2418 2419 break; 2420 case IEEE80211_S_RUN: 2421 if (ic->ic_opmode == IEEE80211_M_STA) 2422 break; 2423 /*FALLTHROUGH*/ 2424 case IEEE80211_S_AUTH: 2425 atw_write_bssid(sc); 2426 atw_write_bcn_thresh(sc); 2427 atw_write_ssid(sc); 2428 atw_write_sup_rates(sc); 2429 2430 if (ic->ic_opmode == IEEE80211_M_AHDEMO || 2431 ic->ic_opmode == IEEE80211_M_MONITOR) 2432 break; 2433 2434 /* set listen interval 2435 * XXX do software units agree w/ hardware? 2436 */ 2437 ATW_WRITE(sc, ATW_BPLI, 2438 LSHIFT(ic->ic_bss->ni_intval, ATW_BPLI_BP_MASK) | 2439 LSHIFT(ic->ic_lintval / ic->ic_bss->ni_intval, 2440 ATW_BPLI_LI_MASK)); 2441 2442 DPRINTF(sc, ("%s: reg[ATW_BPLI] = %08x\n", 2443 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_BPLI))); 2444 2445 atw_tsf(sc); 2446 break; 2447 } 2448 2449 if (nstate != IEEE80211_S_SCAN) 2450 callout_stop(&sc->sc_scan_ch); 2451 2452 if (nstate == IEEE80211_S_RUN && 2453 (ic->ic_opmode == IEEE80211_M_HOSTAP || 2454 ic->ic_opmode == IEEE80211_M_IBSS)) 2455 atw_start_beacon(sc, 1); 2456 else 2457 atw_start_beacon(sc, 0); 2458 2459 return (*sc->sc_newstate)(ic, nstate, arg); 2460 } 2461 2462 /* 2463 * atw_add_rxbuf: 2464 * 2465 * Add a receive buffer to the indicated descriptor. 2466 */ 2467 int 2468 atw_add_rxbuf(struct atw_softc *sc, int idx) 2469 { 2470 struct atw_rxsoft *rxs = &sc->sc_rxsoft[idx]; 2471 struct mbuf *m; 2472 int error; 2473 2474 MGETHDR(m, M_DONTWAIT, MT_DATA); 2475 if (m == NULL) 2476 return (ENOBUFS); 2477 2478 MCLGET(m, M_DONTWAIT); 2479 if ((m->m_flags & M_EXT) == 0) { 2480 m_freem(m); 2481 return (ENOBUFS); 2482 } 2483 2484 if (rxs->rxs_mbuf != NULL) 2485 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2486 2487 rxs->rxs_mbuf = m; 2488 2489 error = bus_dmamap_load(sc->sc_dmat, rxs->rxs_dmamap, 2490 m->m_ext.ext_buf, m->m_ext.ext_size, NULL, 2491 BUS_DMA_READ|BUS_DMA_NOWAIT); 2492 if (error) { 2493 printf("%s: can't load rx DMA map %d, error = %d\n", 2494 sc->sc_dev.dv_xname, idx, error); 2495 panic("atw_add_rxbuf"); /* XXX */ 2496 } 2497 2498 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 2499 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 2500 2501 ATW_INIT_RXDESC(sc, idx); 2502 2503 return (0); 2504 } 2505 2506 /* 2507 * atw_stop: [ ifnet interface function ] 2508 * 2509 * Stop transmission on the interface. 2510 */ 2511 void 2512 atw_stop(struct ifnet *ifp, int disable) 2513 { 2514 struct atw_softc *sc = ifp->if_softc; 2515 struct ieee80211com *ic = &sc->sc_ic; 2516 struct atw_txsoft *txs; 2517 2518 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2519 2520 /* Disable interrupts. */ 2521 ATW_WRITE(sc, ATW_IER, 0); 2522 2523 /* Stop the transmit and receive processes. */ 2524 sc->sc_opmode = 0; 2525 ATW_WRITE(sc, ATW_NAR, 0); 2526 ATW_WRITE(sc, ATW_TDBD, 0); 2527 ATW_WRITE(sc, ATW_TDBP, 0); 2528 ATW_WRITE(sc, ATW_RDB, 0); 2529 2530 /* 2531 * Release any queued transmit buffers. 2532 */ 2533 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 2534 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 2535 if (txs->txs_mbuf != NULL) { 2536 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2537 m_freem(txs->txs_mbuf); 2538 txs->txs_mbuf = NULL; 2539 } 2540 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 2541 } 2542 2543 if (disable) { 2544 atw_rxdrain(sc); 2545 atw_disable(sc); 2546 } 2547 2548 /* 2549 * Mark the interface down and cancel the watchdog timer. 2550 */ 2551 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2552 ifp->if_timer = 0; 2553 2554 /* XXX */ 2555 atw_reset(sc); 2556 } 2557 2558 /* 2559 * atw_rxdrain: 2560 * 2561 * Drain the receive queue. 2562 */ 2563 void 2564 atw_rxdrain(struct atw_softc *sc) 2565 { 2566 struct atw_rxsoft *rxs; 2567 int i; 2568 2569 for (i = 0; i < ATW_NRXDESC; i++) { 2570 rxs = &sc->sc_rxsoft[i]; 2571 if (rxs->rxs_mbuf == NULL) 2572 continue; 2573 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2574 m_freem(rxs->rxs_mbuf); 2575 rxs->rxs_mbuf = NULL; 2576 } 2577 } 2578 2579 /* 2580 * atw_detach: 2581 * 2582 * Detach an ADM8211 interface. 2583 */ 2584 int 2585 atw_detach(struct atw_softc *sc) 2586 { 2587 struct ifnet *ifp = &sc->sc_ic.ic_if; 2588 struct atw_rxsoft *rxs; 2589 struct atw_txsoft *txs; 2590 int i; 2591 2592 /* 2593 * Succeed now if there isn't any work to do. 2594 */ 2595 if ((sc->sc_flags & ATWF_ATTACHED) == 0) 2596 return (0); 2597 2598 ieee80211_ifdetach(ifp); 2599 if_detach(ifp); 2600 2601 for (i = 0; i < ATW_NRXDESC; i++) { 2602 rxs = &sc->sc_rxsoft[i]; 2603 if (rxs->rxs_mbuf != NULL) { 2604 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2605 m_freem(rxs->rxs_mbuf); 2606 rxs->rxs_mbuf = NULL; 2607 } 2608 bus_dmamap_destroy(sc->sc_dmat, rxs->rxs_dmamap); 2609 } 2610 for (i = 0; i < ATW_TXQUEUELEN; i++) { 2611 txs = &sc->sc_txsoft[i]; 2612 if (txs->txs_mbuf != NULL) { 2613 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2614 m_freem(txs->txs_mbuf); 2615 txs->txs_mbuf = NULL; 2616 } 2617 bus_dmamap_destroy(sc->sc_dmat, txs->txs_dmamap); 2618 } 2619 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 2620 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 2621 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 2622 sizeof(struct atw_control_data)); 2623 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 2624 2625 shutdownhook_disestablish(sc->sc_sdhook); 2626 powerhook_disestablish(sc->sc_powerhook); 2627 2628 if (sc->sc_srom) 2629 free(sc->sc_srom, M_DEVBUF); 2630 2631 return (0); 2632 } 2633 2634 /* atw_shutdown: make sure the interface is stopped at reboot time. */ 2635 void 2636 atw_shutdown(void *arg) 2637 { 2638 struct atw_softc *sc = arg; 2639 2640 atw_stop(&sc->sc_ic.ic_if, 1); 2641 } 2642 2643 int 2644 atw_intr(void *arg) 2645 { 2646 struct atw_softc *sc = arg; 2647 struct ifnet *ifp = &sc->sc_ic.ic_if; 2648 u_int32_t status, rxstatus, txstatus, linkstatus; 2649 int handled = 0, txthresh; 2650 2651 #ifdef DEBUG 2652 if (ATW_IS_ENABLED(sc) == 0) 2653 panic("%s: atw_intr: not enabled", sc->sc_dev.dv_xname); 2654 #endif 2655 2656 /* 2657 * If the interface isn't running, the interrupt couldn't 2658 * possibly have come from us. 2659 */ 2660 if ((ifp->if_flags & IFF_RUNNING) == 0 || 2661 (sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 2662 return (0); 2663 2664 for (;;) { 2665 status = ATW_READ(sc, ATW_STSR); 2666 2667 if (status) 2668 ATW_WRITE(sc, ATW_STSR, status); 2669 2670 if (sc->sc_intr_ack != NULL) 2671 (*sc->sc_intr_ack)(sc); 2672 2673 #ifdef ATW_DEBUG 2674 #define PRINTINTR(flag) do { \ 2675 if ((status & flag) != 0) { \ 2676 printf("%s" #flag, delim); \ 2677 delim = ","; \ 2678 } \ 2679 } while (0) 2680 2681 if (atw_debug > 1 && status) { 2682 const char *delim = "<"; 2683 2684 printf("%s: reg[STSR] = %x", 2685 sc->sc_dev.dv_xname, status); 2686 2687 PRINTINTR(ATW_INTR_FBE); 2688 PRINTINTR(ATW_INTR_LINKOFF); 2689 PRINTINTR(ATW_INTR_LINKON); 2690 PRINTINTR(ATW_INTR_RCI); 2691 PRINTINTR(ATW_INTR_RDU); 2692 PRINTINTR(ATW_INTR_REIS); 2693 PRINTINTR(ATW_INTR_RPS); 2694 PRINTINTR(ATW_INTR_TCI); 2695 PRINTINTR(ATW_INTR_TDU); 2696 PRINTINTR(ATW_INTR_TLT); 2697 PRINTINTR(ATW_INTR_TPS); 2698 PRINTINTR(ATW_INTR_TRT); 2699 PRINTINTR(ATW_INTR_TUF); 2700 PRINTINTR(ATW_INTR_BCNTC); 2701 PRINTINTR(ATW_INTR_ATIME); 2702 PRINTINTR(ATW_INTR_TBTT); 2703 PRINTINTR(ATW_INTR_TSCZ); 2704 PRINTINTR(ATW_INTR_TSFTF); 2705 printf(">\n"); 2706 } 2707 #undef PRINTINTR 2708 #endif /* ATW_DEBUG */ 2709 2710 if ((status & sc->sc_inten) == 0) 2711 break; 2712 2713 handled = 1; 2714 2715 rxstatus = status & sc->sc_rxint_mask; 2716 txstatus = status & sc->sc_txint_mask; 2717 linkstatus = status & sc->sc_linkint_mask; 2718 2719 if (linkstatus) { 2720 atw_linkintr(sc, linkstatus); 2721 } 2722 2723 if (rxstatus) { 2724 /* Grab any new packets. */ 2725 atw_rxintr(sc); 2726 2727 if (rxstatus & ATW_INTR_RDU) { 2728 printf("%s: receive ring overrun\n", 2729 sc->sc_dev.dv_xname); 2730 /* Get the receive process going again. */ 2731 ATW_WRITE(sc, ATW_RDR, 0x1); 2732 break; 2733 } 2734 } 2735 2736 if (txstatus) { 2737 /* Sweep up transmit descriptors. */ 2738 atw_txintr(sc); 2739 2740 if (txstatus & ATW_INTR_TLT) 2741 DPRINTF(sc, ("%s: tx lifetime exceeded\n", 2742 sc->sc_dev.dv_xname)); 2743 2744 if (txstatus & ATW_INTR_TRT) 2745 DPRINTF(sc, ("%s: tx retry limit exceeded\n", 2746 sc->sc_dev.dv_xname)); 2747 2748 /* If Tx under-run, increase our transmit threshold 2749 * if another is available. 2750 */ 2751 txthresh = sc->sc_txthresh + 1; 2752 if ((txstatus & ATW_INTR_TUF) && 2753 sc->sc_txth[txthresh].txth_name != NULL) { 2754 /* Idle the transmit process. */ 2755 atw_idle(sc, ATW_NAR_ST); 2756 2757 sc->sc_txthresh = txthresh; 2758 sc->sc_opmode &= ~(ATW_NAR_TR_MASK|ATW_NAR_SF); 2759 sc->sc_opmode |= 2760 sc->sc_txth[txthresh].txth_opmode; 2761 printf("%s: transmit underrun; new " 2762 "threshold: %s\n", sc->sc_dev.dv_xname, 2763 sc->sc_txth[txthresh].txth_name); 2764 2765 /* Set the new threshold and restart 2766 * the transmit process. 2767 */ 2768 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 2769 /* XXX Log every Nth underrun from 2770 * XXX now on? 2771 */ 2772 } 2773 } 2774 2775 if (status & (ATW_INTR_TPS|ATW_INTR_RPS)) { 2776 if (status & ATW_INTR_TPS) 2777 printf("%s: transmit process stopped\n", 2778 sc->sc_dev.dv_xname); 2779 if (status & ATW_INTR_RPS) 2780 printf("%s: receive process stopped\n", 2781 sc->sc_dev.dv_xname); 2782 (void)atw_init(ifp); 2783 break; 2784 } 2785 2786 if (status & ATW_INTR_FBE) { 2787 printf("%s: fatal bus error\n", sc->sc_dev.dv_xname); 2788 (void)atw_init(ifp); 2789 break; 2790 } 2791 2792 /* 2793 * Not handled: 2794 * 2795 * Transmit buffer unavailable -- normal 2796 * condition, nothing to do, really. 2797 * 2798 * Early receive interrupt -- not available on 2799 * all chips, we just use RI. We also only 2800 * use single-segment receive DMA, so this 2801 * is mostly useless. 2802 * 2803 * TBD others 2804 */ 2805 } 2806 2807 /* Try to get more packets going. */ 2808 atw_start(ifp); 2809 2810 return (handled); 2811 } 2812 2813 /* 2814 * atw_idle: 2815 * 2816 * Cause the transmit and/or receive processes to go idle. 2817 * 2818 * XXX It seems that the ADM8211 will not signal the end of the Rx/Tx 2819 * process in STSR if I clear SR or ST after the process has already 2820 * ceased. Fair enough. But the Rx process status bits in ATW_TEST0 2821 * do not seem to be too reliable. Perhaps I have the sense of the 2822 * Rx bits switched with the Tx bits? 2823 */ 2824 void 2825 atw_idle(struct atw_softc *sc, u_int32_t bits) 2826 { 2827 u_int32_t ackmask = 0, opmode, stsr, test0; 2828 int i, s; 2829 2830 /* without this, somehow we run concurrently w/ interrupt handler */ 2831 s = splnet(); 2832 2833 opmode = sc->sc_opmode & ~bits; 2834 2835 if (bits & ATW_NAR_SR) 2836 ackmask |= ATW_INTR_RPS; 2837 2838 if (bits & ATW_NAR_ST) { 2839 ackmask |= ATW_INTR_TPS; 2840 /* set ATW_NAR_HF to flush TX FIFO. */ 2841 opmode |= ATW_NAR_HF; 2842 } 2843 2844 ATW_WRITE(sc, ATW_NAR, opmode); 2845 2846 for (i = 0; i < 1000; i++) { 2847 stsr = ATW_READ(sc, ATW_STSR); 2848 if ((stsr & ackmask) == ackmask) 2849 break; 2850 DELAY(10); 2851 } 2852 2853 ATW_WRITE(sc, ATW_STSR, stsr & ackmask); 2854 2855 if ((stsr & ackmask) == ackmask) 2856 goto out; 2857 2858 test0 = ATW_READ(sc, ATW_TEST0); 2859 2860 if ((bits & ATW_NAR_ST) != 0 && (stsr & ATW_INTR_TPS) == 0 && 2861 (test0 & ATW_TEST0_TS_MASK) != ATW_TEST0_TS_STOPPED) { 2862 printf("%s: transmit process not idle [%s]\n", 2863 sc->sc_dev.dv_xname, 2864 atw_tx_state[MASK_AND_RSHIFT(test0, ATW_TEST0_TS_MASK)]); 2865 printf("%s: bits %08x test0 %08x stsr %08x\n", 2866 sc->sc_dev.dv_xname, bits, test0, stsr); 2867 } 2868 2869 if ((bits & ATW_NAR_SR) != 0 && (stsr & ATW_INTR_RPS) == 0 && 2870 (test0 & ATW_TEST0_RS_MASK) != ATW_TEST0_RS_STOPPED) { 2871 DPRINTF2(sc, ("%s: receive process not idle [%s]\n", 2872 sc->sc_dev.dv_xname, 2873 atw_rx_state[MASK_AND_RSHIFT(test0, ATW_TEST0_RS_MASK)])); 2874 DPRINTF2(sc, ("%s: bits %08x test0 %08x stsr %08x\n", 2875 sc->sc_dev.dv_xname, bits, test0, stsr)); 2876 } 2877 out: 2878 splx(s); 2879 return; 2880 } 2881 2882 /* 2883 * atw_linkintr: 2884 * 2885 * Helper; handle link-status interrupts. 2886 */ 2887 void 2888 atw_linkintr(struct atw_softc *sc, u_int32_t linkstatus) 2889 { 2890 struct ieee80211com *ic = &sc->sc_ic; 2891 2892 if (ic->ic_state != IEEE80211_S_RUN) 2893 return; 2894 2895 if (linkstatus & ATW_INTR_LINKON) { 2896 DPRINTF(sc, ("%s: link on\n", sc->sc_dev.dv_xname)); 2897 sc->sc_rescan_timer = 0; 2898 } else if (linkstatus & ATW_INTR_LINKOFF) { 2899 DPRINTF(sc, ("%s: link off\n", sc->sc_dev.dv_xname)); 2900 switch (ic->ic_opmode) { 2901 case IEEE80211_M_HOSTAP: 2902 return; 2903 case IEEE80211_M_IBSS: 2904 if (ic->ic_flags & IEEE80211_F_SIBSS) 2905 return; 2906 /*FALLTHROUGH*/ 2907 case IEEE80211_M_STA: 2908 sc->sc_rescan_timer = 3; 2909 ic->ic_if.if_timer = 1; 2910 break; 2911 default: 2912 break; 2913 } 2914 } 2915 } 2916 2917 /* 2918 * atw_rxintr: 2919 * 2920 * Helper; handle receive interrupts. 2921 */ 2922 void 2923 atw_rxintr(struct atw_softc *sc) 2924 { 2925 static int rate_tbl[] = {2, 4, 11, 22, 44}; 2926 struct ieee80211com *ic = &sc->sc_ic; 2927 struct ieee80211_node *ni; 2928 struct ieee80211_frame *wh; 2929 struct ifnet *ifp = &ic->ic_if; 2930 struct atw_rxsoft *rxs; 2931 struct mbuf *m; 2932 u_int32_t rxstat; 2933 int i, len, rate, rate0; 2934 u_int32_t rssi; 2935 2936 for (i = sc->sc_rxptr;; i = ATW_NEXTRX(i)) { 2937 rxs = &sc->sc_rxsoft[i]; 2938 2939 ATW_CDRXSYNC(sc, i, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 2940 2941 rxstat = le32toh(sc->sc_rxdescs[i].ar_stat); 2942 rssi = le32toh(sc->sc_rxdescs[i].ar_rssi); 2943 rate0 = MASK_AND_RSHIFT(rxstat, ATW_RXSTAT_RXDR_MASK); 2944 2945 if (rxstat & ATW_RXSTAT_OWN) 2946 break; /* We have processed all receive buffers. */ 2947 2948 DPRINTF3(sc, 2949 ("%s: rx stat %08x rssi %08x buf1 %08x buf2 %08x\n", 2950 sc->sc_dev.dv_xname, 2951 sc->sc_rxdescs[i].ar_stat, 2952 sc->sc_rxdescs[i].ar_rssi, 2953 sc->sc_rxdescs[i].ar_buf1, 2954 sc->sc_rxdescs[i].ar_buf2)); 2955 2956 /* 2957 * Make sure the packet fit in one buffer. This should 2958 * always be the case. 2959 */ 2960 if ((rxstat & (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) != 2961 (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) { 2962 printf("%s: incoming packet spilled, resetting\n", 2963 sc->sc_dev.dv_xname); 2964 (void)atw_init(ifp); 2965 return; 2966 } 2967 2968 /* 2969 * If an error occurred, update stats, clear the status 2970 * word, and leave the packet buffer in place. It will 2971 * simply be reused the next time the ring comes around. 2972 * If 802.1Q VLAN MTU is enabled, ignore the Frame Too Long 2973 * error. 2974 */ 2975 2976 if ((rxstat & ATW_RXSTAT_ES) != 0 && 2977 ((sc->sc_ic.ic_ec.ec_capenable & ETHERCAP_VLAN_MTU) == 0 || 2978 (rxstat & (ATW_RXSTAT_DE | ATW_RXSTAT_SFDE | 2979 ATW_RXSTAT_SIGE | ATW_RXSTAT_CRC16E | 2980 ATW_RXSTAT_RXTOE | ATW_RXSTAT_CRC32E | 2981 ATW_RXSTAT_ICVE)) != 0)) { 2982 #define PRINTERR(bit, str) \ 2983 if (rxstat & (bit)) \ 2984 printf("%s: receive error: %s\n", \ 2985 sc->sc_dev.dv_xname, str) 2986 ifp->if_ierrors++; 2987 PRINTERR(ATW_RXSTAT_DE, "descriptor error"); 2988 PRINTERR(ATW_RXSTAT_SFDE, "PLCP SFD error"); 2989 PRINTERR(ATW_RXSTAT_SIGE, "PLCP signal error"); 2990 PRINTERR(ATW_RXSTAT_CRC16E, "PLCP CRC16 error"); 2991 PRINTERR(ATW_RXSTAT_RXTOE, "time-out"); 2992 PRINTERR(ATW_RXSTAT_CRC32E, "FCS error"); 2993 PRINTERR(ATW_RXSTAT_ICVE, "WEP ICV error"); 2994 #undef PRINTERR 2995 ATW_INIT_RXDESC(sc, i); 2996 continue; 2997 } 2998 2999 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 3000 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 3001 3002 /* 3003 * No errors; receive the packet. Note the ADM8211 3004 * includes the CRC in promiscuous mode. 3005 */ 3006 len = MASK_AND_RSHIFT(rxstat, ATW_RXSTAT_FL_MASK); 3007 3008 /* 3009 * Allocate a new mbuf cluster. If that fails, we are 3010 * out of memory, and must drop the packet and recycle 3011 * the buffer that's already attached to this descriptor. 3012 */ 3013 m = rxs->rxs_mbuf; 3014 if (atw_add_rxbuf(sc, i) != 0) { 3015 ifp->if_ierrors++; 3016 ATW_INIT_RXDESC(sc, i); 3017 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 3018 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 3019 continue; 3020 } 3021 3022 ifp->if_ipackets++; 3023 if (sc->sc_opmode & ATW_NAR_PR) 3024 m->m_flags |= M_HASFCS; 3025 m->m_pkthdr.rcvif = ifp; 3026 m->m_pkthdr.len = m->m_len = len; 3027 3028 if (rate0 >= sizeof(rate_tbl) / sizeof(rate_tbl[0])) 3029 rate = 0; 3030 else 3031 rate = rate_tbl[rate0]; 3032 3033 #if NBPFILTER > 0 3034 /* Pass this up to any BPF listeners. */ 3035 if (sc->sc_radiobpf != NULL) { 3036 struct mbuf mb; 3037 3038 struct atw_rx_radiotap_header *tap = &sc->sc_rxtap; 3039 3040 tap->ar_rate = rate; 3041 tap->ar_chan_freq = ic->ic_bss->ni_chan->ic_freq; 3042 tap->ar_chan_flags = ic->ic_bss->ni_chan->ic_flags; 3043 3044 /* TBD verify units are dB */ 3045 tap->ar_antsignal = (int)rssi; 3046 /* TBD tap->ar_flags */ 3047 3048 M_COPY_PKTHDR(&mb, m); 3049 mb.m_data = (caddr_t)tap; 3050 mb.m_len = tap->ar_ihdr.it_len; 3051 mb.m_next = m; 3052 mb.m_pkthdr.len += mb.m_len; 3053 bpf_mtap(sc->sc_radiobpf, &mb); 3054 } 3055 #endif /* NPBFILTER > 0 */ 3056 3057 wh = mtod(m, struct ieee80211_frame *); 3058 ni = ieee80211_find_rxnode(ic, wh); 3059 if (m->m_pkthdr.len >= sizeof(struct ieee80211_frame_min) || 3060 ic->ic_opmode == IEEE80211_M_MONITOR) 3061 ieee80211_input(ifp, m, ni, (int)rssi, 0); 3062 /* 3063 * The frame may have caused the node to be marked for 3064 * reclamation (e.g. in response to a DEAUTH message) 3065 * so use free_node here instead of unref_node. 3066 */ 3067 if (ni == ic->ic_bss) 3068 ieee80211_unref_node(&ni); 3069 else 3070 ieee80211_free_node(ic, ni); 3071 } 3072 3073 /* Update the receive pointer. */ 3074 sc->sc_rxptr = i; 3075 } 3076 3077 /* 3078 * atw_txintr: 3079 * 3080 * Helper; handle transmit interrupts. 3081 */ 3082 void 3083 atw_txintr(struct atw_softc *sc) 3084 { 3085 #define TXSTAT_ERRMASK (ATW_TXSTAT_TUF | ATW_TXSTAT_TLT | ATW_TXSTAT_TRT | \ 3086 ATW_TXSTAT_TRO | ATW_TXSTAT_SOFBR) 3087 #define TXSTAT_FMT "\20\31ATW_TXSTAT_SOFBR\32ATW_TXSTAT_TRO\33ATW_TXSTAT_TUF" \ 3088 "\34ATW_TXSTAT_TRT\35ATW_TXSTAT_TLT" 3089 3090 static char txstat_buf[sizeof("ffffffff<>" TXSTAT_FMT)]; 3091 struct ifnet *ifp = &sc->sc_ic.ic_if; 3092 struct atw_txsoft *txs; 3093 u_int32_t txstat; 3094 3095 DPRINTF3(sc, ("%s: atw_txintr: sc_flags 0x%08x\n", 3096 sc->sc_dev.dv_xname, sc->sc_flags)); 3097 3098 ifp->if_flags &= ~IFF_OACTIVE; 3099 3100 /* 3101 * Go through our Tx list and free mbufs for those 3102 * frames that have been transmitted. 3103 */ 3104 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 3105 ATW_CDTXSYNC(sc, txs->txs_lastdesc, 3106 txs->txs_ndescs, 3107 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3108 3109 #ifdef ATW_DEBUG 3110 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3111 int i; 3112 printf(" txsoft %p transmit chain:\n", txs); 3113 for (i = txs->txs_firstdesc;; i = ATW_NEXTTX(i)) { 3114 printf(" descriptor %d:\n", i); 3115 printf(" at_status: 0x%08x\n", 3116 le32toh(sc->sc_txdescs[i].at_stat)); 3117 printf(" at_flags: 0x%08x\n", 3118 le32toh(sc->sc_txdescs[i].at_flags)); 3119 printf(" at_buf1: 0x%08x\n", 3120 le32toh(sc->sc_txdescs[i].at_buf1)); 3121 printf(" at_buf2: 0x%08x\n", 3122 le32toh(sc->sc_txdescs[i].at_buf2)); 3123 if (i == txs->txs_lastdesc) 3124 break; 3125 } 3126 } 3127 #endif 3128 3129 txstat = le32toh(sc->sc_txdescs[txs->txs_lastdesc].at_stat); 3130 if (txstat & ATW_TXSTAT_OWN) 3131 break; 3132 3133 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 3134 3135 sc->sc_txfree += txs->txs_ndescs; 3136 3137 bus_dmamap_sync(sc->sc_dmat, txs->txs_dmamap, 3138 0, txs->txs_dmamap->dm_mapsize, 3139 BUS_DMASYNC_POSTWRITE); 3140 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 3141 m_freem(txs->txs_mbuf); 3142 txs->txs_mbuf = NULL; 3143 3144 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 3145 3146 if ((ifp->if_flags & IFF_DEBUG) != 0 && 3147 (txstat & TXSTAT_ERRMASK) != 0) { 3148 bitmask_snprintf(txstat & TXSTAT_ERRMASK, TXSTAT_FMT, 3149 txstat_buf, sizeof(txstat_buf)); 3150 printf("%s: txstat %s %d\n", sc->sc_dev.dv_xname, 3151 txstat_buf, 3152 MASK_AND_RSHIFT(txstat, ATW_TXSTAT_ARC_MASK)); 3153 } 3154 3155 /* 3156 * Check for errors and collisions. 3157 */ 3158 if (txstat & ATW_TXSTAT_TUF) 3159 sc->sc_stats.ts_tx_tuf++; 3160 if (txstat & ATW_TXSTAT_TLT) 3161 sc->sc_stats.ts_tx_tlt++; 3162 if (txstat & ATW_TXSTAT_TRT) 3163 sc->sc_stats.ts_tx_trt++; 3164 if (txstat & ATW_TXSTAT_TRO) 3165 sc->sc_stats.ts_tx_tro++; 3166 if (txstat & ATW_TXSTAT_SOFBR) { 3167 sc->sc_stats.ts_tx_sofbr++; 3168 } 3169 3170 if ((txstat & ATW_TXSTAT_ES) == 0) 3171 ifp->if_collisions += 3172 MASK_AND_RSHIFT(txstat, ATW_TXSTAT_ARC_MASK); 3173 else 3174 ifp->if_oerrors++; 3175 3176 ifp->if_opackets++; 3177 } 3178 3179 /* 3180 * If there are no more pending transmissions, cancel the watchdog 3181 * timer. 3182 */ 3183 if (txs == NULL) 3184 sc->sc_tx_timer = 0; 3185 #undef TXSTAT_ERRMASK 3186 #undef TXSTAT_FMT 3187 } 3188 3189 /* 3190 * atw_watchdog: [ifnet interface function] 3191 * 3192 * Watchdog timer handler. 3193 */ 3194 void 3195 atw_watchdog(struct ifnet *ifp) 3196 { 3197 struct atw_softc *sc = ifp->if_softc; 3198 struct ieee80211com *ic = &sc->sc_ic; 3199 3200 ifp->if_timer = 0; 3201 if (ATW_IS_ENABLED(sc) == 0) 3202 return; 3203 3204 if (sc->sc_rescan_timer) { 3205 if (--sc->sc_rescan_timer == 0) 3206 (void)ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 3207 } 3208 if (sc->sc_tx_timer) { 3209 if (--sc->sc_tx_timer == 0 && 3210 !SIMPLEQ_EMPTY(&sc->sc_txdirtyq)) { 3211 printf("%s: transmit timeout\n", ifp->if_xname); 3212 ifp->if_oerrors++; 3213 (void)atw_init(ifp); 3214 atw_start(ifp); 3215 } 3216 } 3217 if (sc->sc_tx_timer != 0 || sc->sc_rescan_timer != 0) 3218 ifp->if_timer = 1; 3219 ieee80211_watchdog(ifp); 3220 } 3221 3222 /* Compute the 802.11 Duration field and the PLCP Length fields for 3223 * a len-byte frame (HEADER + PAYLOAD + FCS) sent at rate * 500Kbps. 3224 * Write the fields to the ADM8211 Tx header, frm. 3225 * 3226 * TBD use the fragmentation threshold to find the right duration for 3227 * the first & last fragments. 3228 * 3229 * TBD make certain of the duration fields applied by the ADM8211 to each 3230 * fragment. I think that the ADM8211 knows how to subtract the CTS 3231 * duration when ATW_HDRCTL_RTSCTS is clear; that is why I add it regardless. 3232 * I also think that the ADM8211 does *some* arithmetic for us, because 3233 * otherwise I think we would have to set a first duration for CTS/first 3234 * fragment, a second duration for fragments between the first and the 3235 * last, and a third duration for the last fragment. 3236 * 3237 * TBD make certain that duration fields reflect addition of FCS/WEP 3238 * and correct duration arithmetic as necessary. 3239 */ 3240 static void 3241 atw_frame_setdurs(struct atw_softc *sc, struct atw_frame *frm, int rate, 3242 int len) 3243 { 3244 int remainder; 3245 3246 /* deal also with encrypted fragments */ 3247 if (frm->atw_hdrctl & htole16(ATW_HDRCTL_WEP)) { 3248 DPRINTF2(sc, ("%s: atw_frame_setdurs len += 8\n", 3249 sc->sc_dev.dv_xname)); 3250 len += IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + 3251 IEEE80211_WEP_CRCLEN; 3252 } 3253 3254 /* 802.11 Duration Field for CTS/Data/ACK sequence minus FCS & WEP 3255 * duration (XXX added by MAC?). 3256 */ 3257 frm->atw_head_dur = (16 * (len - IEEE80211_CRC_LEN)) / rate; 3258 remainder = (16 * (len - IEEE80211_CRC_LEN)) % rate; 3259 3260 if (rate <= 4) 3261 /* 1-2Mbps WLAN: send ACK/CTS at 1Mbps */ 3262 frm->atw_head_dur += 3 * (IEEE80211_DUR_DS_SIFS + 3263 IEEE80211_DUR_DS_SHORT_PREAMBLE + 3264 IEEE80211_DUR_DS_FAST_PLCPHDR) + 3265 IEEE80211_DUR_DS_SLOW_CTS + IEEE80211_DUR_DS_SLOW_ACK; 3266 else 3267 /* 5-11Mbps WLAN: send ACK/CTS at 2Mbps */ 3268 frm->atw_head_dur += 3 * (IEEE80211_DUR_DS_SIFS + 3269 IEEE80211_DUR_DS_SHORT_PREAMBLE + 3270 IEEE80211_DUR_DS_FAST_PLCPHDR) + 3271 IEEE80211_DUR_DS_FAST_CTS + IEEE80211_DUR_DS_FAST_ACK; 3272 3273 /* lengthen duration if long preamble */ 3274 if ((sc->sc_flags & ATWF_SHORT_PREAMBLE) == 0) 3275 frm->atw_head_dur += 3276 3 * (IEEE80211_DUR_DS_LONG_PREAMBLE - 3277 IEEE80211_DUR_DS_SHORT_PREAMBLE) + 3278 3 * (IEEE80211_DUR_DS_SLOW_PLCPHDR - 3279 IEEE80211_DUR_DS_FAST_PLCPHDR); 3280 3281 if (remainder != 0) 3282 frm->atw_head_dur++; 3283 3284 if ((atw_voodoo & VOODOO_DUR_2_4_SPECIALCASE) && 3285 (rate == 2 || rate == 4)) { 3286 /* derived from Linux: how could this be right? */ 3287 frm->atw_head_plcplen = frm->atw_head_dur; 3288 } else { 3289 frm->atw_head_plcplen = (16 * len) / rate; 3290 remainder = (80 * len) % (rate * 5); 3291 3292 if (remainder != 0) { 3293 frm->atw_head_plcplen++; 3294 3295 /* XXX magic */ 3296 if ((atw_voodoo & VOODOO_DUR_11_ROUNDING) && 3297 rate == 22 && remainder <= 30) 3298 frm->atw_head_plcplen |= 0x8000; 3299 } 3300 } 3301 frm->atw_tail_plcplen = frm->atw_head_plcplen = 3302 htole16(frm->atw_head_plcplen); 3303 frm->atw_tail_dur = frm->atw_head_dur = htole16(frm->atw_head_dur); 3304 } 3305 3306 #ifdef ATW_DEBUG 3307 static void 3308 atw_dump_pkt(struct ifnet *ifp, struct mbuf *m0) 3309 { 3310 struct atw_softc *sc = ifp->if_softc; 3311 struct mbuf *m; 3312 int i, noctets = 0; 3313 3314 printf("%s: %d-byte packet\n", sc->sc_dev.dv_xname, 3315 m0->m_pkthdr.len); 3316 3317 for (m = m0; m; m = m->m_next) { 3318 if (m->m_len == 0) 3319 continue; 3320 for (i = 0; i < m->m_len; i++) { 3321 printf(" %02x", ((u_int8_t*)m->m_data)[i]); 3322 if (++noctets % 24 == 0) 3323 printf("\n"); 3324 } 3325 } 3326 printf("%s%s: %d bytes emitted\n", 3327 (noctets % 24 != 0) ? "\n" : "", sc->sc_dev.dv_xname, noctets); 3328 } 3329 #endif /* ATW_DEBUG */ 3330 3331 /* 3332 * atw_start: [ifnet interface function] 3333 * 3334 * Start packet transmission on the interface. 3335 */ 3336 void 3337 atw_start(struct ifnet *ifp) 3338 { 3339 struct atw_softc *sc = ifp->if_softc; 3340 struct ieee80211com *ic = &sc->sc_ic; 3341 struct ieee80211_node *ni; 3342 struct ieee80211_frame *wh; 3343 struct atw_frame *hh; 3344 struct mbuf *m0, *m; 3345 struct atw_txsoft *txs, *last_txs; 3346 struct atw_txdesc *txd; 3347 int do_encrypt, rate; 3348 bus_dmamap_t dmamap; 3349 int ctl, error, firsttx, nexttx, lasttx = -1, first, ofree, seg; 3350 3351 DPRINTF2(sc, ("%s: atw_start: sc_flags 0x%08x, if_flags 0x%08x\n", 3352 sc->sc_dev.dv_xname, sc->sc_flags, ifp->if_flags)); 3353 3354 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 3355 return; 3356 3357 #if 0 /* TBD ??? */ 3358 if ((sc->sc_flags & ATWF_LINK_UP) == 0 && ifp->if_snd.ifq_len < 10) 3359 return; 3360 #endif 3361 3362 /* 3363 * Remember the previous number of free descriptors and 3364 * the first descriptor we'll use. 3365 */ 3366 ofree = sc->sc_txfree; 3367 firsttx = sc->sc_txnext; 3368 3369 DPRINTF2(sc, ("%s: atw_start: txfree %d, txnext %d\n", 3370 sc->sc_dev.dv_xname, ofree, firsttx)); 3371 3372 /* 3373 * Loop through the send queue, setting up transmit descriptors 3374 * until we drain the queue, or use up all available transmit 3375 * descriptors. 3376 */ 3377 while ((txs = SIMPLEQ_FIRST(&sc->sc_txfreeq)) != NULL && 3378 sc->sc_txfree != 0) { 3379 3380 do_encrypt = 0; 3381 /* 3382 * Grab a packet off the management queue, if it 3383 * is not empty. Otherwise, from the data queue. 3384 */ 3385 IF_DEQUEUE(&ic->ic_mgtq, m0); 3386 if (m0 != NULL) { 3387 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 3388 m0->m_pkthdr.rcvif = NULL; 3389 } else { 3390 IFQ_DEQUEUE(&ifp->if_snd, m0); 3391 if (m0 == NULL) 3392 break; 3393 #if NBPFILTER > 0 3394 if (ifp->if_bpf != NULL) 3395 bpf_mtap(ifp->if_bpf, m0); 3396 #endif /* NBPFILTER > 0 */ 3397 if ((m0 = ieee80211_encap(ifp, m0, &ni)) == NULL) { 3398 ifp->if_oerrors++; 3399 break; 3400 } 3401 } 3402 3403 rate = MAX(ieee80211_get_rate(ic), 2); 3404 3405 #if NBPFILTER > 0 3406 /* 3407 * Pass the packet to any BPF listeners. 3408 */ 3409 if (ic->ic_rawbpf != NULL) 3410 bpf_mtap((caddr_t)ic->ic_rawbpf, m0); 3411 3412 if (sc->sc_radiobpf != NULL) { 3413 struct mbuf mb; 3414 struct atw_tx_radiotap_header *tap = &sc->sc_txtap; 3415 3416 tap->at_rate = rate; 3417 tap->at_chan_freq = ic->ic_bss->ni_chan->ic_freq; 3418 tap->at_chan_flags = ic->ic_bss->ni_chan->ic_flags; 3419 3420 /* TBD tap->at_flags */ 3421 3422 M_COPY_PKTHDR(&mb, m0); 3423 mb.m_data = (caddr_t)tap; 3424 mb.m_len = tap->at_ihdr.it_len; 3425 mb.m_next = m0; 3426 mb.m_pkthdr.len += mb.m_len; 3427 bpf_mtap(sc->sc_radiobpf, &mb); 3428 } 3429 #endif /* NBPFILTER > 0 */ 3430 3431 M_PREPEND(m0, offsetof(struct atw_frame, atw_ihdr), M_DONTWAIT); 3432 3433 if (ni != NULL && ni != ic->ic_bss) 3434 ieee80211_free_node(ic, ni); 3435 3436 if (m0 == NULL) { 3437 ifp->if_oerrors++; 3438 break; 3439 } 3440 3441 /* just to make sure. */ 3442 m0 = m_pullup(m0, sizeof(struct atw_frame)); 3443 3444 if (m0 == NULL) { 3445 ifp->if_oerrors++; 3446 break; 3447 } 3448 3449 hh = mtod(m0, struct atw_frame *); 3450 wh = &hh->atw_ihdr; 3451 3452 do_encrypt = (wh->i_fc[1] & IEEE80211_FC1_WEP) ? 1 : 0; 3453 3454 /* Copy everything we need from the 802.11 header: 3455 * Frame Control; address 1, address 3, or addresses 3456 * 3 and 4. NIC fills in BSSID, SA. 3457 */ 3458 if (wh->i_fc[1] & IEEE80211_FC1_DIR_TODS) { 3459 if (wh->i_fc[1] & IEEE80211_FC1_DIR_FROMDS) 3460 panic("%s: illegal WDS frame", 3461 sc->sc_dev.dv_xname); 3462 memcpy(hh->atw_dst, wh->i_addr3, IEEE80211_ADDR_LEN); 3463 } else 3464 memcpy(hh->atw_dst, wh->i_addr1, IEEE80211_ADDR_LEN); 3465 3466 *(u_int16_t*)hh->atw_fc = *(u_int16_t*)wh->i_fc; 3467 3468 /* initialize remaining Tx parameters */ 3469 memset(&hh->u, 0, sizeof(hh->u)); 3470 3471 hh->atw_rate = rate * 5; 3472 /* XXX this could be incorrect if M_FCS. _encap should 3473 * probably strip FCS just in case it sticks around in 3474 * bridged packets. 3475 */ 3476 hh->atw_service = IEEE80211_PLCP_SERVICE; /* XXX guess */ 3477 hh->atw_paylen = htole16(m0->m_pkthdr.len - 3478 sizeof(struct atw_frame)); 3479 3480 #if 0 3481 /* this virtually guaranteed that WEP-encrypted frames 3482 * are fragmented. oops. 3483 */ 3484 hh->atw_fragthr = htole16(m0->m_pkthdr.len - 3485 sizeof(struct atw_frame) + sizeof(struct ieee80211_frame)); 3486 hh->atw_fragthr &= htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3487 #else 3488 hh->atw_fragthr = htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3489 #endif 3490 3491 hh->atw_rtylmt = 3; 3492 hh->atw_hdrctl = htole16(ATW_HDRCTL_UNKNOWN1); 3493 if (do_encrypt) { 3494 hh->atw_hdrctl |= htole16(ATW_HDRCTL_WEP); 3495 hh->atw_keyid = ic->ic_wep_txkey; 3496 } 3497 3498 /* TBD 4-addr frames */ 3499 atw_frame_setdurs(sc, hh, rate, 3500 m0->m_pkthdr.len - sizeof(struct atw_frame) + 3501 sizeof(struct ieee80211_frame) + IEEE80211_CRC_LEN); 3502 3503 /* never fragment multicast frames */ 3504 if (IEEE80211_IS_MULTICAST(hh->atw_dst)) { 3505 hh->atw_fragthr = htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3506 } else if (sc->sc_flags & ATWF_RTSCTS) { 3507 hh->atw_hdrctl |= htole16(ATW_HDRCTL_RTSCTS); 3508 } 3509 3510 #ifdef ATW_DEBUG 3511 /* experimental stuff */ 3512 if (atw_xrtylmt != ~0) 3513 hh->atw_rtylmt = atw_xrtylmt; 3514 if (atw_xhdrctl != 0) 3515 hh->atw_hdrctl |= htole16(atw_xhdrctl); 3516 if (atw_xservice != IEEE80211_PLCP_SERVICE) 3517 hh->atw_service = atw_xservice; 3518 if (atw_xpaylen != 0) 3519 hh->atw_paylen = htole16(atw_xpaylen); 3520 hh->atw_fragnum = 0; 3521 3522 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3523 printf("%s: dst = %s, rate = 0x%02x, " 3524 "service = 0x%02x, paylen = 0x%04x\n", 3525 sc->sc_dev.dv_xname, ether_sprintf(hh->atw_dst), 3526 hh->atw_rate, hh->atw_service, hh->atw_paylen); 3527 3528 printf("%s: fc[0] = 0x%02x, fc[1] = 0x%02x, " 3529 "dur1 = 0x%04x, dur2 = 0x%04x, " 3530 "dur3 = 0x%04x, rts_dur = 0x%04x\n", 3531 sc->sc_dev.dv_xname, hh->atw_fc[0], hh->atw_fc[1], 3532 hh->atw_tail_plcplen, hh->atw_head_plcplen, 3533 hh->atw_tail_dur, hh->atw_head_dur); 3534 3535 printf("%s: hdrctl = 0x%04x, fragthr = 0x%04x, " 3536 "fragnum = 0x%02x, rtylmt = 0x%04x\n", 3537 sc->sc_dev.dv_xname, hh->atw_hdrctl, 3538 hh->atw_fragthr, hh->atw_fragnum, hh->atw_rtylmt); 3539 3540 printf("%s: keyid = %d\n", 3541 sc->sc_dev.dv_xname, hh->atw_keyid); 3542 3543 atw_dump_pkt(ifp, m0); 3544 } 3545 #endif /* ATW_DEBUG */ 3546 3547 dmamap = txs->txs_dmamap; 3548 3549 /* 3550 * Load the DMA map. Copy and try (once) again if the packet 3551 * didn't fit in the alloted number of segments. 3552 */ 3553 for (first = 1; 3554 (error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 3555 BUS_DMA_WRITE|BUS_DMA_NOWAIT)) != 0 && first; 3556 first = 0) { 3557 MGETHDR(m, M_DONTWAIT, MT_DATA); 3558 if (m == NULL) { 3559 printf("%s: unable to allocate Tx mbuf\n", 3560 sc->sc_dev.dv_xname); 3561 break; 3562 } 3563 if (m0->m_pkthdr.len > MHLEN) { 3564 MCLGET(m, M_DONTWAIT); 3565 if ((m->m_flags & M_EXT) == 0) { 3566 printf("%s: unable to allocate Tx " 3567 "cluster\n", sc->sc_dev.dv_xname); 3568 m_freem(m); 3569 break; 3570 } 3571 } 3572 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t)); 3573 m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len; 3574 m_freem(m0); 3575 m0 = m; 3576 m = NULL; 3577 } 3578 if (error != 0) { 3579 printf("%s: unable to load Tx buffer, " 3580 "error = %d\n", sc->sc_dev.dv_xname, error); 3581 m_freem(m0); 3582 break; 3583 } 3584 3585 /* 3586 * Ensure we have enough descriptors free to describe 3587 * the packet. 3588 */ 3589 if (dmamap->dm_nsegs > sc->sc_txfree) { 3590 /* 3591 * Not enough free descriptors to transmit 3592 * this packet. Unload the DMA map and 3593 * drop the packet. Notify the upper layer 3594 * that there are no more slots left. 3595 * 3596 * XXX We could allocate an mbuf and copy, but 3597 * XXX it is worth it? 3598 */ 3599 ifp->if_flags |= IFF_OACTIVE; 3600 bus_dmamap_unload(sc->sc_dmat, dmamap); 3601 m_freem(m0); 3602 break; 3603 } 3604 3605 /* 3606 * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET. 3607 */ 3608 3609 /* Sync the DMA map. */ 3610 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize, 3611 BUS_DMASYNC_PREWRITE); 3612 3613 /* XXX arbitrary retry limit; 8 because I have seen it in 3614 * use already and maybe 0 means "no tries" ! 3615 */ 3616 ctl = htole32(LSHIFT(8, ATW_TXCTL_TL_MASK)); 3617 3618 DPRINTF2(sc, ("%s: TXDR <- max(10, %d)\n", 3619 sc->sc_dev.dv_xname, rate * 5)); 3620 ctl |= htole32(LSHIFT(MAX(10, rate * 5), ATW_TXCTL_TXDR_MASK)); 3621 3622 /* 3623 * Initialize the transmit descriptors. 3624 */ 3625 for (nexttx = sc->sc_txnext, seg = 0; 3626 seg < dmamap->dm_nsegs; 3627 seg++, nexttx = ATW_NEXTTX(nexttx)) { 3628 /* 3629 * If this is the first descriptor we're 3630 * enqueueing, don't set the OWN bit just 3631 * yet. That could cause a race condition. 3632 * We'll do it below. 3633 */ 3634 txd = &sc->sc_txdescs[nexttx]; 3635 txd->at_ctl = ctl | 3636 ((nexttx == firsttx) ? 0 : htole32(ATW_TXCTL_OWN)); 3637 3638 txd->at_buf1 = htole32(dmamap->dm_segs[seg].ds_addr); 3639 txd->at_flags = 3640 htole32(LSHIFT(dmamap->dm_segs[seg].ds_len, 3641 ATW_TXFLAG_TBS1_MASK)) | 3642 ((nexttx == (ATW_NTXDESC - 1)) 3643 ? htole32(ATW_TXFLAG_TER) : 0); 3644 lasttx = nexttx; 3645 } 3646 3647 IASSERT(lasttx != -1, ("bad lastx")); 3648 /* Set `first segment' and `last segment' appropriately. */ 3649 sc->sc_txdescs[sc->sc_txnext].at_flags |= 3650 htole32(ATW_TXFLAG_FS); 3651 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_LS); 3652 3653 #ifdef ATW_DEBUG 3654 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3655 printf(" txsoft %p transmit chain:\n", txs); 3656 for (seg = sc->sc_txnext;; seg = ATW_NEXTTX(seg)) { 3657 printf(" descriptor %d:\n", seg); 3658 printf(" at_ctl: 0x%08x\n", 3659 le32toh(sc->sc_txdescs[seg].at_ctl)); 3660 printf(" at_flags: 0x%08x\n", 3661 le32toh(sc->sc_txdescs[seg].at_flags)); 3662 printf(" at_buf1: 0x%08x\n", 3663 le32toh(sc->sc_txdescs[seg].at_buf1)); 3664 printf(" at_buf2: 0x%08x\n", 3665 le32toh(sc->sc_txdescs[seg].at_buf2)); 3666 if (seg == lasttx) 3667 break; 3668 } 3669 } 3670 #endif 3671 3672 /* Sync the descriptors we're using. */ 3673 ATW_CDTXSYNC(sc, sc->sc_txnext, dmamap->dm_nsegs, 3674 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3675 3676 /* 3677 * Store a pointer to the packet so we can free it later, 3678 * and remember what txdirty will be once the packet is 3679 * done. 3680 */ 3681 txs->txs_mbuf = m0; 3682 txs->txs_firstdesc = sc->sc_txnext; 3683 txs->txs_lastdesc = lasttx; 3684 txs->txs_ndescs = dmamap->dm_nsegs; 3685 3686 /* Advance the tx pointer. */ 3687 sc->sc_txfree -= dmamap->dm_nsegs; 3688 sc->sc_txnext = nexttx; 3689 3690 SIMPLEQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q); 3691 SIMPLEQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); 3692 3693 last_txs = txs; 3694 } 3695 3696 if (txs == NULL || sc->sc_txfree == 0) { 3697 /* No more slots left; notify upper layer. */ 3698 ifp->if_flags |= IFF_OACTIVE; 3699 } 3700 3701 if (sc->sc_txfree != ofree) { 3702 DPRINTF2(sc, ("%s: packets enqueued, IC on %d, OWN on %d\n", 3703 sc->sc_dev.dv_xname, lasttx, firsttx)); 3704 /* 3705 * Cause a transmit interrupt to happen on the 3706 * last packet we enqueued. 3707 */ 3708 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_IC); 3709 ATW_CDTXSYNC(sc, lasttx, 1, 3710 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3711 3712 /* 3713 * The entire packet chain is set up. Give the 3714 * first descriptor to the chip now. 3715 */ 3716 sc->sc_txdescs[firsttx].at_ctl |= htole32(ATW_TXCTL_OWN); 3717 ATW_CDTXSYNC(sc, firsttx, 1, 3718 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3719 3720 /* Wake up the transmitter. */ 3721 /* XXX USE AUTOPOLLING? */ 3722 ATW_WRITE(sc, ATW_TDR, 0x1); 3723 3724 /* Set a watchdog timer in case the chip flakes out. */ 3725 sc->sc_tx_timer = 5; 3726 ifp->if_timer = 1; 3727 } 3728 } 3729 3730 /* 3731 * atw_power: 3732 * 3733 * Power management (suspend/resume) hook. 3734 */ 3735 void 3736 atw_power(int why, void *arg) 3737 { 3738 struct atw_softc *sc = arg; 3739 struct ifnet *ifp = &sc->sc_ic.ic_if; 3740 int s; 3741 3742 DPRINTF(sc, ("%s: atw_power(%d,)\n", sc->sc_dev.dv_xname, why)); 3743 3744 s = splnet(); 3745 switch (why) { 3746 case PWR_STANDBY: 3747 /* XXX do nothing. */ 3748 break; 3749 case PWR_SUSPEND: 3750 atw_stop(ifp, 0); 3751 if (sc->sc_power != NULL) 3752 (*sc->sc_power)(sc, why); 3753 break; 3754 case PWR_RESUME: 3755 if (ifp->if_flags & IFF_UP) { 3756 if (sc->sc_power != NULL) 3757 (*sc->sc_power)(sc, why); 3758 atw_init(ifp); 3759 } 3760 break; 3761 case PWR_SOFTSUSPEND: 3762 case PWR_SOFTSTANDBY: 3763 case PWR_SOFTRESUME: 3764 break; 3765 } 3766 splx(s); 3767 } 3768 3769 /* 3770 * atw_ioctl: [ifnet interface function] 3771 * 3772 * Handle control requests from the operator. 3773 */ 3774 int 3775 atw_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 3776 { 3777 struct atw_softc *sc = ifp->if_softc; 3778 struct ifreq *ifr = (struct ifreq *)data; 3779 int s, error = 0; 3780 3781 /* XXX monkey see, monkey do. comes from wi_ioctl. */ 3782 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 3783 return ENXIO; 3784 3785 s = splnet(); 3786 3787 switch (cmd) { 3788 case SIOCSIFFLAGS: 3789 if (ifp->if_flags & IFF_UP) { 3790 if (ATW_IS_ENABLED(sc)) { 3791 /* 3792 * To avoid rescanning another access point, 3793 * do not call atw_init() here. Instead, 3794 * only reflect media settings. 3795 */ 3796 atw_filter_setup(sc); 3797 } else 3798 error = atw_init(ifp); 3799 } else if (ATW_IS_ENABLED(sc)) 3800 atw_stop(ifp, 1); 3801 break; 3802 case SIOCADDMULTI: 3803 case SIOCDELMULTI: 3804 error = (cmd == SIOCADDMULTI) ? 3805 ether_addmulti(ifr, &sc->sc_ic.ic_ec) : 3806 ether_delmulti(ifr, &sc->sc_ic.ic_ec); 3807 if (error == ENETRESET) { 3808 if (ATW_IS_ENABLED(sc)) 3809 atw_filter_setup(sc); /* do not rescan */ 3810 error = 0; 3811 } 3812 break; 3813 default: 3814 error = ieee80211_ioctl(ifp, cmd, data); 3815 if (error == ENETRESET) { 3816 if (ATW_IS_ENABLED(sc)) 3817 error = atw_init(ifp); 3818 else 3819 error = 0; 3820 } 3821 break; 3822 } 3823 3824 /* Try to get more packets going. */ 3825 if (ATW_IS_ENABLED(sc)) 3826 atw_start(ifp); 3827 3828 splx(s); 3829 return (error); 3830 } 3831 3832 static int 3833 atw_media_change(struct ifnet *ifp) 3834 { 3835 int error; 3836 3837 error = ieee80211_media_change(ifp); 3838 if (error == ENETRESET) { 3839 if ((ifp->if_flags & (IFF_RUNNING|IFF_UP)) == 3840 (IFF_RUNNING|IFF_UP)) 3841 atw_init(ifp); /* XXX lose error */ 3842 error = 0; 3843 } 3844 return error; 3845 } 3846 3847 static void 3848 atw_media_status(struct ifnet *ifp, struct ifmediareq *imr) 3849 { 3850 struct atw_softc *sc = ifp->if_softc; 3851 3852 if (ATW_IS_ENABLED(sc) == 0) { 3853 imr->ifm_active = IFM_IEEE80211 | IFM_NONE; 3854 imr->ifm_status = 0; 3855 return; 3856 } 3857 ieee80211_media_status(ifp, imr); 3858 } 3859
Indexes created Wed Sep 24 14:09:57 GMT 2025